Patent Description:
Articles of footwear generally include two primary elements: an upper and a sole structure. The upper may be formed from a variety of materials that are stitched or adhesively bonded together to form a void within the footwear for comfortably and securely receiving a foot. The sole structure is secured to a lower portion of the upper and is generally positioned between the foot and the ground. In many articles of footwear, including athletic footwear styles, the sole structure often incorporates an insole, a midsole, and an outsole.

<CIT> describes a material that includes at least one layer made of an auxetic structure and articles of footwear having soles comprising the materials. When the material is under tension, it expands in both the direction under tension and in the directional orthogonal to the direction under tension. The articles of footwear have soles that have at least one layer made of a material that has a pattern of geometrical patterns with polygonal apertures. The geometrical patterns have hinged polygons that rotate with respect to each other when the sole is under lateral or longitudinal tension, thus increasing the lateral and longitudinal dimensions of the sole.

<CIT> describes a shoe with an outsole having at least one traction zone, the traction zone including a base surface in a first plane, a plurality of ground engaging members in a second plane and a plurality of intersecting grooves defined by a pair of opposing walls and a groove surface located in a third plane. The base surface includes a plurality of spaced apart base surface elements. The plurality of intersecting grooves is positioned adjacent the plurality of base surface segments and the ground engaging members. The first, second and third planes are positioned elevationally in spaced apart arrangement from one another. The ground engaging members project out beyond the first plane while the intersecting grooves are recessed from the first plane toward a shoe upper. Each of the ground engaging members includes side walls and an angled first surface for contacting the ground.

<CIT> describes a footwear having an outsole including treads spaced about <NUM> to about <NUM> from one another so that a rocky terrain feature can fit between adjacent treads thereby providing traction through the outsole on the rocky terrain feature, each tread of a height of about <NUM> to about <NUM> so the tread engages the rocky terrain feature without substantially bending upon such engagement. The treads can include a tread edge defining a right angle to form a substantially non-radiused corner. The outsole can include preselected regions having different durometers, e.g., a harder durometer to assist the treads in holding firm against terrain features, and a softer durometer to add flexibility to the outsole. A footbed with zone pods and secondary pods can be secured to the upper in a Strobel construction, the zone pods and secondary pods interacting with the outsole to provide enhanced feedback to the wearer.

The claimed invention is defined by independent claim <NUM>. Additional embodiments are defined in the dependent claims.

In the following, <FIG> show embodiments for better understanding the claimed invention. <FIG> shows an embodiment in accordance with the claimed invention.

<FIG> is an isometric view of an embodiment of an article of footwear <NUM>. In the exemplary embodiment, article of footwear <NUM> has the form of an athletic shoe. However, in other embodiments, the provisions discussed herein for article of footwear <NUM> could be incorporated into various other kinds of footwear including, but not limited to, basketball shoes, hiking boots, soccer shoes, football shoes, sneakers, running shoes, cross-training shoes, rugby shoes, baseball shoes as well as other kinds of shoes. Moreover, in some embodiments, the provisions discussed herein for article of footwear <NUM> could be incorporated into various other kinds of non-sports related footwear, including, but not limited to, slippers, sandals, high-heeled footwear, and loafers.

For purposes of clarity, the following detailed description discusses the features of article of footwear <NUM>, also referred to simply as article <NUM>. However, it will be understood that other embodiments may incorporate a corresponding article of footwear (e.g., a left article of footwear when article <NUM> is a right article of footwear) that may share some, and possibly all, of the features of article <NUM> described herein and shown in the figures.

The embodiments may be characterized by various directional adjectives and reference portions. These directions and reference portions may facilitate in describing the portions of an article of footwear. Moreover, these directions and reference portions may also be used in describing subcomponents of an article of footwear (e.g., directions and/or portions of an inner sole component, a midsole component, an outer sole component, an upper, or any other components).

For consistency and convenience, directional adjectives are employed throughout this detailed description corresponding to the illustrated embodiments. The term "longitudinal" as used throughout this detailed description and in the clauses refers to a direction oriented along a length of a component (e.g., an upper or sole component). In some cases, a longitudinal direction may be parallel to a longitudinal axis that extends between a forefoot portion and a heel portion of the component. Also, the term "lateral" as used throughout this detailed description and in the clauses refers to a direction oriented along a width of a component. In some cases, a lateral direction may be parallel to a lateral axis that extends between a medial side and a lateral side of a component. Furthermore, the term "vertical" as used throughout this detailed description and in the clauses refers to a direction generally perpendicular to a lateral and longitudinal direction. For example, in cases where an article is planted flat on a ground surface, a vertical direction may extend from the ground surface upward. Additionally, the term "inner" refers to a portion of an article disposed closer to an interior of an article, or closer to a foot when the article is worn. Likewise, the term "outer" refers to a portion of an article disposed further from the interior of the article or from the foot. Thus, for example, the inner surface of a component is disposed closer to an interior of the article than the outer surface of the component. This detailed description makes use of these directional adjectives in describing an article and various components of the article, including an upper, a midsole structure, and/or an outer sole structure.

Article <NUM> may be characterized by a number of different regions or portions. For example, article <NUM> could include a forefoot portion, a midfoot portion, a heel portion, and an ankle portion. Moreover, components of article <NUM> could likewise comprise corresponding portions. Referring to <FIG>, article <NUM> may be divided into forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM>. Forefoot region <NUM> may be generally associated with the toes and joints connecting the metatarsals with the phalanges. Midfoot region <NUM> may be generally associated with the arch of a foot. Likewise, heel region <NUM> may be generally associated with the heel of a foot, including the calcaneus bone. Article <NUM> may also include an ankle portion, which may also be referred to as a cuff portion that is associated with the ankle of a user. In addition, article <NUM> may include lateral side <NUM> and medial side <NUM>. In particular, lateral side <NUM> and medial side <NUM> may be opposing sides of article <NUM>. Furthermore, both lateral side <NUM> and medial side <NUM> may extend through forefoot region <NUM>, midfoot region <NUM>, heel region <NUM>, and the ankle portion.

<FIG> illustrates an exploded isometric view of an embodiment of article of footwear <NUM>. <FIG> and <FIG> illustrate various components of article of footwear <NUM>, including an upper <NUM> and a sole structure <NUM>.

Generally, upper <NUM> may be any type of upper. In particular, upper <NUM> may have any design, shape, size, and/or color. For example, in embodiments where article <NUM> is a basketball shoe, upper <NUM> could be a high-top upper that is shaped to provide high support on an ankle. In embodiments where article <NUM> is a running shoe, upper <NUM> could be a low-top upper.

In some embodiments, upper <NUM> includes opening <NUM> that provides entry for the foot into an interior cavity of upper <NUM>. In some embodiments, upper <NUM> may also include a tongue that provides cushioning and support across the instep of the foot. Some embodiments may include fastening provisions, including, but not limited to, laces, cables, straps, buttons, zippers as well as any other provisions known in the art for fastening articles. In some embodiments, lace <NUM> may be applied at a fastening region of upper <NUM>.

Some embodiments may include uppers that extend beneath the foot, thereby providing <NUM>-degree coverage at some regions of the foot. However, other embodiments need not include uppers that extend beneath the foot. In other embodiments, for example, an upper could have a lower periphery joined with a strobel, sole structure, and/or sock liner.

An upper could be formed from a variety of different manufacturing techniques, resulting in various kinds of upper structures. For example, in some embodiments, an upper could have a braided construction, a knitted (e.g., warp-knitted) construction, or some other woven construction. In an exemplary embodiment, upper <NUM> may be a knitted upper.

In some embodiments, sole structure <NUM> may be configured to provide traction for article <NUM>. In addition to providing traction, sole structure <NUM> may attenuate ground reaction forces when compressed between the foot and the ground during walking, running, or other ambulatory activities. The configuration of sole structure <NUM> may vary significantly in different embodiments to include a variety of conventional or non-conventional structures. In some cases, the configuration of sole structure <NUM> can be configured according to one or more types of ground surfaces on which sole structure <NUM> may be used. Examples of ground surfaces include, but are not limited to, natural turf, synthetic turf, dirt, hardwood flooring, as well as other surfaces.

Sole structure <NUM> is secured to upper <NUM> and extends between the foot and the ground when article <NUM> is worn. In different embodiments, sole structure <NUM> may include different components. In some embodiments, sole structure <NUM> may include midsole component <NUM> and a plurality of outer sole members. In some cases, one or more of these components may be optional.

Midsole component <NUM> may be configured to provide cushioning, shock absorption, energy return, support, as well as possibly other provisions. To this end, midsole component <NUM> may have a geometry that provides structure and support for article <NUM>. Specifically, midsole component <NUM> may be seen to have upper surface <NUM> and sidewall portion <NUM>. Sidewall portion <NUM> may extend around the entire periphery <NUM> of midsole component <NUM>. As seen in <FIG>, sidewall portion <NUM> may partially wrap up the sides of upper <NUM> to provide increased support along the base of the foot. Upper surface <NUM> may be generally oriented toward upper <NUM>, while an outer surface <NUM> may be oriented outwardly.

Referring to <FIG>, in some embodiments, midsole component <NUM> may include a plurality of recessed portions <NUM> that may extend partially through the thickness of midsole component <NUM> from outer surface <NUM> toward upper surface <NUM>. In some embodiments, the thickness of the plurality of recessed portions <NUM> may vary throughout sole structure <NUM>. For example, in some embodiments, the recessed portions located in heel region <NUM> may be deeper or extend along a larger distance through sole structure <NUM> than the recessed portions located in forefoot region <NUM>. In other embodiments, the depth of the recessed portions may be consistent throughout sole structure <NUM>.

In different embodiments, midsole component <NUM> may generally incorporate various provisions associated with midsoles. For example, in one embodiment, a midsole component may be formed from a polymer foam material that attenuates ground reaction forces (i.e., provides cushioning) during walking, running, and other ambulatory activities. In various embodiments, midsole components may also include fluid-filled chambers, plates, moderators, or other elements that further attenuate forces, enhance stability, or influence the motions of the foot, for example.

<FIG> illustrates a bottom view of sole structure <NUM>. As seen in <FIG>, the plurality of outer sole members includes six distinct outer sole members. Specifically, sole structure <NUM> includes first outer sole member <NUM>, second outer sole member <NUM>, third outer sole member <NUM>, fourth outer sole member <NUM>, fifth outer sole member <NUM>, and sixth outer sole member <NUM>. Although the exemplary embodiment includes six different outer sole members, other embodiments could include any other number of outer sole members. In another embodiment, for example, only a single outer sole member may be present. In still another embodiment, only two outer sole members may be used. In still another embodiment, only three outer sole members could be used. In still other embodiments, seven or more outer sole members could be used.

Generally, an outer sole member may be configured as a ground-contacting member. In some embodiments, an outer sole member could include properties associated with outsoles, such as durability, wear resistance, and increased traction. In other embodiments, an outer sole member could include properties associated with a midsole, including cushioning, strength, and support. In the exemplary embodiment, the plurality of outer sole members may be configured as outsole-like members that enhance traction with a ground surface while maintaining wear resistance.

In different embodiments, the locations of one or more outer sole members could vary. In some embodiments, one or more outer sole members could be disposed in a forefoot portion of a sole structure. In other embodiments, one or more outer sole members could be disposed in a midfoot portion of a sole structure. In still other embodiments, one or more outer sole members could be disposed in a heel portion of a sole structure. In an exemplary embodiment, first outer sole member <NUM> may be disposed in forefoot region <NUM> of sole structure <NUM>. More specifically, first outer sole member <NUM> may be disposed adjacent toe edge <NUM>. In addition, in the exemplary embodiment second outer sole member <NUM>, third outer sole member <NUM>, fourth outer sole member <NUM>, fifth outer sole member <NUM>, and sixth outer sole member <NUM> may be disposed in heel region <NUM> of sole structure <NUM>. More specifically, second outer sole member <NUM> and third outer sole member <NUM> may be generally disposed on lateral side <NUM>. Fifth outer sole member <NUM> and sixth outer sole member <NUM> may be generally disposed on medial side <NUM>. Further, fourth outer sole member <NUM> may be located between third outer sole member <NUM> and fifth outer sole member <NUM>. Fourth outer sole member <NUM> may be disposed along heel edge <NUM> of sole structure <NUM>. Furthermore, second outer sole member <NUM>, third outer sole member <NUM>, fourth outer sole member <NUM>, fifth outer sole member <NUM>, and sixth outer sole member <NUM> are spaced apart from one another in heel region <NUM>. This exemplary configuration provides outer sole members at areas of increased ground contact during various lateral and medial cuts, so as to enhance traction during these motions.

The sizes of various outer sole members could vary. In the embodiments, first outer sole member <NUM> may be the largest outer sole member of the plurality of the outer sole members. Moreover, sixth outer sole member <NUM> may be substantially smaller than first outer sole member <NUM>. Additionally, second outer sole member <NUM>, third outer sole member <NUM>, fourth outer sole member <NUM>, fifth outer sole member <NUM>, and sixth outer sole member <NUM> may each individually be smaller that first outer sole member <NUM>. The outer sole members in heel region <NUM> may, however, have a larger total surface area than the surface area of first outer sole member <NUM>. Individualized control of various areas of heel region <NUM> may be realized by spacing the outer sole members in heel region <NUM>.

In some embodiments, an inner surface of the outer sole members may be disposed against midsole component <NUM>. The outer surface of the outer sole members may face outwardly and may be a ground-contacting surface.

In different embodiments, the materials and/or physical properties of an outer sole member could vary. In some embodiments, an outer sole member could have a relatively high coefficient of friction when compared to a midsole component. For example, in an exemplary embodiment, first outer sole member <NUM> may have a first coefficient of friction with a predetermined material (e.g., wood, laminate, asphalt, concrete, etc.) and midsole component <NUM> may have a second coefficient of friction with the same predetermined material. In some embodiments, the first coefficient of friction is different than the second coefficient of friction. In an exemplary embodiment, the first coefficient of friction is greater than the second coefficient of friction, so that first outer sole member <NUM> provides increased traction (or grip) with the predetermined material in comparison to midsole component <NUM>. In at least some embodiments, the predetermined material may be associated with a type of ground surface. For example, the predetermined material could be wood associated with wood flooring in basketball courts. In other embodiments, the predetermined material could be laminate material that may also be associated with some kinds of courts. In still other embodiments, the predetermined material could be asphalt. In still other embodiments, the predetermined material could be concrete.

Likewise, in some embodiments, each of the remaining outer sole members may also have higher coefficients of friction (relative to a given ground surface) than midsole component <NUM>. This arrangement may allow a user to brake or make cuts by engaging at least one of the outer sole members with a ground surface. It will be understood that in other embodiments, first outer sole member <NUM> could have a coefficient of friction equal to or less than the coefficient of friction of midsole component <NUM>.

It may be appreciated that the coefficient of friction may change according to ambient conditions such as temperature, velocity, etc. Moreover, the coefficients of friction could be different for dry versus wet conditions. As used herein, the first coefficient of friction and the second coefficient of friction defined for first outer sole member <NUM> and midsole component <NUM>, respectively, may be dry coefficients of friction at standard temperatures and pressures.

Increased friction with a ground surface can be achieved by utilizing materials having higher coefficients of friction and/or by providing surface features that enhance grip with the ground. Such features could include tread elements such as ridges, hemispheric protrusions, cylindrical protrusions as well as other kinds of tread elements.

In different embodiments, the densities of an outer sole member and/or a midsole component could vary. In some embodiments, an outer sole member may have a higher density than a midsole component, thereby allowing for increased durability and wear resistance for the outer sole member. In other embodiments, however, the density of the outer sole member could be equal to the density of the midsole component, or could be less than the density of the midsole component.

Outer sole members could be manufactured from a variety of different materials. Exemplary materials include, but are not limited to, rubber (e.g., carbon rubber or blown rubber), polymers, thermoplastics (e.g., thermoplastic polyurethane), as well as possibly other materials. In contrast, midsole components may generally be manufactured from polyurethane, polyurethane foam, other kinds of foams as well as possibly other materials. It will be understood that the type of materials for outer sole members and a midsole component could be selected according to various factors including manufacturing requirements and desired performance characteristics. In an exemplary embodiment, suitable materials for the outer sole members and midsole component <NUM> could be selected to ensure the outer sole members have a larger coefficient of friction than midsole component <NUM>, especially when these components are in contact with hardwood surfaces, laminate surfaces, asphalt, as well as other surfaces where article of footwear <NUM> may be most commonly used.

In different embodiments, upper <NUM> and sole structure <NUM> could be joined in various ways. In some embodiments, upper <NUM> could be joined to a strobel using an adhesive or by stitching. In other embodiments, upper <NUM> could be joined to midsole component <NUM>, for example, along sidewall portion <NUM>. In still other embodiments, upper <NUM> could be joined with both a strobel and midsole component <NUM>. Moreover, these components may be joined using any methods known in the art for joining sole components with uppers, including various lasting techniques and provisions (e.g., board lasting, slip lasting, etc.). Such bonding or attachment could be accomplished using any known methods for bonding components of articles of footwear, including, but not limited to, adhesives, films, tapes, staples, stitching, or other methods.

The outer sole members may be likewise bonded or otherwise attached to midsole component <NUM>. Such bonding or attachment could be accomplished using any known methods for bonding components of articles of footwear, including, but not limited to, adhesives, films, tapes, staples, stitching, or other methods.

In at least some embodiments, midsole component <NUM> and the outer sole members could be formed and/or bonded together during a molding process. For example, in some embodiments, upon forming midsole component <NUM>, first outer sole member <NUM> may be molded within forming midsole component <NUM>.

Embodiments can include provisions to facilitate expansion and/or adaptability of a sole structure during dynamic motions. A sole structure is configured with auxetic provisions. In particular, one or more components of the sole structure are capable of undergoing auxetic motions (e.g., expansion and/or contraction).

Sole structure <NUM>, as shown in <FIG> and as described further in detail below, has an auxetic structure or configuration. Sole structures comprising auxetic structures are described in <CIT> and entitled "Auxetic Structures and Footwear with Soles Having Auxetic Structures" (the "Auxetic Structures application").

As described in the Auxetic Structures application, auxetic materials have a negative Poisson's ratio, such that when they are under tension in a first direction their dimensions increase both in the first direction and in a second direction orthogonal or perpendicular to the first direction. This property of an auxetic material is illustrated in <FIG>.

As seen in <FIG>, sole structure <NUM> may include plurality of recessed portions <NUM>. As used herein, the term "recessed portion" refers to any hollowed area or recessed area in a component. In some cases, a recessed portion may be a through hole, in which the recessed portion extends between two opposing surfaces of a component. In other cases, a recessed portion may be a blind-hole, in which the recessed portion may not extend through the entire thickness of the component and may therefore only be open on one side. Moreover, as discussed in further detail below, a component may utilize a combination of through holes and blind-holes. Furthermore, the term "recessed portion" may be used interchangeably in some cases with "aperture" or "hole.

In regions including one or more recessed portions, sole structure <NUM> may be further associated with a plurality of discrete sole portions <NUM>, or sole portions <NUM>. Specifically, sole portions <NUM> comprise the portions of sole structure <NUM> that extend between plurality of recessed portions <NUM>. It may also be seen that plurality of recessed portions <NUM> extend between sole portions <NUM>. Thus, it may be understood that each recessed portion may be surrounded by a plurality of sole portions, such that the boundary of each recessed portion may be defined by the edges of the sole portions. In some embodiments, some recessed portions may be surrounded by six different sole portions. For example, recessed portion <NUM> is surrounded by sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, and sole portion <NUM>. Moreover, each of sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, and sole portion <NUM> have one edge that bounds a portion of recessed portion <NUM>. In some embodiments, each of the sole portions surrounding a recessed portion may be connected to one another. For example, sole portion <NUM> and sole portion <NUM> may be connected to each other by junction <NUM>. Additionally, in some embodiments, sole portion <NUM> may be connected to sole portion <NUM> by a junction. In other embodiments, each of the sole portions may be discrete and separate from one another.

In some embodiments, two or more sole portions may be associated with one another. That is, in some embodiments, a plurality of sole portions may include a junction or otherwise be joined to one another. Two or more sole portions that are joined to one another may be referred to as "dynamic portions. " Within a dynamic portion, the motion of one sole portion may influence the motion of adjacent sole portions.

As seen in <FIG>, plurality of recessed portions <NUM> may extend through a majority of midsole component <NUM>. In some embodiments, plurality of recessed portions <NUM> may extend through forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM> of midsole component <NUM>. In other embodiments, plurality of recessed portions <NUM> may not extend through each of these portions.

In some embodiments, the outer sole members may extend around or adjacent to plurality of recessed portions <NUM>. For example, first outer sole member <NUM> extends around a portion of recessed portion <NUM>. In other embodiments, one or more outer sole members may extend over a recessed portion. In still further embodiments, a recessed portion may extend through one or more outer sole members.

In different embodiments, the geometry of one or more recessed portions could vary. In the exemplary embodiment, a majority of the plurality of recessed portions <NUM> may have a tri-star geometry, including three legs or points extending from a common center. Examples of different geometries that could be used for an auxetic sole structure are disclosed in the detailed description. Moreover, embodiments could also utilize any other geometries, such as utilizing sole portions with parallelogram geometries or other polygonal geometries that are arranged in a pattern to provide the sole with an auxetic structure.

The geometry of one or more sole portions could also vary. It may be understood that the geometry of a sole portion may be determined by the geometry of the recessed portions in an auxetic pattern, and vice versa. For example, changing the shape of a sole portion may change the shape of an adjacent recessed portion. In the exemplary embodiment, each sole portion has an approximately triangular geometry. In other embodiments, sole portions may have other shapes including regular and irregular shapes.

In some embodiments, the geometry of the recessed portions may vary throughout the length of sole structure <NUM>. For example, in some embodiments, the size of the recessed portions may be larger in the forefoot region than in the midfoot region or heel region. By varying the size of the recessed portions, different bending characteristics and cutting characteristic may be provided along various areas of sole structure <NUM>.

Additionally, in some embodiments, the shape of the recessed portions may be different along different areas of sole structure <NUM>. For example, in some embodiments, the recessed portion located along the periphery of sole structure <NUM> may have a different shape than other recessed portions of sole structure <NUM>. In some embodiments, the recessed portions along the periphery may include two legs or points that extend from a common center.

Plurality of recessed portions <NUM> are arranged on sole structure <NUM> in an auxetic pattern, or auxetic configuration. In other words, plurality of recessed portions <NUM> are arranged on midsole component <NUM> and/or the outer sole members in a manner that allows those components to undergo auxetic motions, such as expansion or contraction. An example of auxetic expansion, which occurs as the result of the auxetic configuration of plurality of recessed portions <NUM>, is shown in <FIG>. Initially, in <FIG>, sole structure <NUM> is in a non-tensioned state. In this state, plurality of recessed portions <NUM> have an un-tensioned area. For purposes of illustration, only representative region <NUM> of midsole component <NUM> is shown, where representative region <NUM> includes a subset of recessed portions <NUM>.

As tension is applied across sole structure <NUM> along an exemplary longitudinal axis <NUM> (e.g., along the length of sole structure <NUM>) as shown in <FIG>, sole structure <NUM> undergoes auxetic expansion. That is, sole structure <NUM> expands along directions parallel to longitudinal axis <NUM>, as well as along directions parallel to lateral axis <NUM>, which is perpendicular to exemplary longitudinal axis <NUM>. In <FIG>, the representative region <NUM> is seen to expand along both longitudinal axis <NUM> and lateral axis <NUM> simultaneously, as subset of recessed portions <NUM> increase in size.

<FIG> illustrates a bottom isometric view of sole structure <NUM>, including an enlarged cross-sectional view of sole portions surrounding a recessed portion. The four sole portions are oriented around recessed portion <NUM>. As shown, sole portion <NUM>, sole portion <NUM>, sole portion <NUM>, and sole portion <NUM> border recessed portion <NUM>. Dynamic portion <NUM> may refer to the structure of sole portion <NUM>, junction <NUM>, and sole portion <NUM>. Additionally, dynamic portion <NUM> may refer to the structure of sole portion <NUM>, junction <NUM>, and sole portion <NUM>. Dynamic portions and sole portions may be referred to throughout the detailed description.

Although sole portions may be discussed as individual pieces, the sole portions may be formed as a unitary piece with midsole component <NUM>. Further, multiple sole portions may be interconnected or formed from a unitary piece. Sole portions may be numbered for ease of discussion. In some embodiments, the sole portions may not be individual pieces or portions. For example, dynamic portion <NUM> and dynamic portion <NUM> may comprise portions of a single or unitary piece of midsole component <NUM>. In other embodiments, multiple individual sole portions may be oriented around a recessed portion. An example of a dynamic portion comprised of two sole portions is shown in <FIG>. In other embodiments, differently shaped and sized sole portions may be utilized. The shape and size of sole portions along with their relative positioning to recessed portions will be discussed in further detail in the detailed description.

In some embodiments, a sole portion may include a raised or elevated portion. In some embodiments, the elevated portions may be shaped to correspond to the areas of midsole component <NUM> between each of the recessed portions. For example, first elevated portion <NUM> is located adjacent to recessed portion <NUM>, recessed portion <NUM>, and recessed portion <NUM>. The shape of first elevated portion <NUM> corresponds to the space between the recessed portions. For example, a portion of first elevated portion <NUM> abuts a leg of each of recessed portion <NUM>, recessed portion <NUM>, and recessed portion <NUM>. Therefore, the shape of first elevated portion <NUM> corresponds to the shape of the space between each of the recessed portions that abut first elevated portion <NUM>.

In some embodiments, a junction may extend between adjacent sole portions. In some embodiments, the junction may extend between each sole portion to form or define a dynamic portion. Junction <NUM> joins sole portion <NUM> and sole portion <NUM>. Additionally, multiple junctions extend between various sole portions throughout sole structure <NUM>.

In some embodiments, the junctions may be located at different levels than the elevated portions. That is, in some embodiments, outer surface <NUM> of the elevated portions may be on a different plane than the outer surface of the junction. As used throughout this detailed description, outer surface <NUM> refers to the surface of sole structure <NUM> that is located adjacent to a ground surface or other surface during normal use. Outer surface <NUM> does not include inner recessed surface <NUM>. For convenience and clarity, the outer surface of the elevated portions and the outer surface of the junctions may be particularly labeled.

In <FIG>, junction <NUM> extends between sole portion <NUM> and sole portion <NUM>. As shown in <FIG>, for example, outer surface <NUM> of junction <NUM> is located at a level that is closer to the foot of a user or the inner surface of sole structure <NUM> than outer surface <NUM> of first elevated portion <NUM> located on sole portion <NUM> and outer surface <NUM> of second elevated portion <NUM> located on sole portion <NUM>.

Further, in some embodiments, the junction may border more than one recessed portion. For example, as shown in <FIG>, junction <NUM> borders recessed portion <NUM> as well as recessed portion <NUM>. As shown, junction <NUM> borders a central region of recessed portion <NUM>. In contrast, junction <NUM> also borders a leg or point of recessed portion <NUM>. Therefore, junction <NUM> may border different areas of different recessed portions.

Additionally, second elevated portion <NUM>, third elevated portion <NUM>, and fourth elevated portion <NUM> are oriented along recessed portion <NUM>. A fifth raised portion and a sixth raised portion may be oriented along recessed portion <NUM>; however, the fifth raised portion and the sixth raised portion may not be visible in this orientation. In the embodiment as depicted throughout the figures of this detailed description, the elevated portions are formed in a general triangular shape. The triangular shape is due to the shape of the recessed portions. In other embodiments, elevated portions may have different shapes to correspond or extend along portions of differently shaped recessed portions. Additionally, in some figures in the detailed description, the elevated portions may be removed for ease of viewing and description.

As shown throughout this detailed description, many of the recessed portions may be surrounded by dynamic portions that are positioned adjacent to one another and connected to one another. As used throughout this detailed description, the dynamic portions referred to include two sole portions. In other embodiments, dynamic portions may utilize any number of sole portions greater than one sole portion. Additionally, dynamic portions are shown as two sole portions for ease of viewing and discussion.

In some areas of sole structure <NUM>, each of the recessed portions is located adjacent to another recessed portion. In such cases, the sole portions may bound or border a portion of more than one recessed portion. For example, sole portion <NUM> and sole portion <NUM> define at least a portion of recessed portion <NUM>, recessed portion <NUM>, recessed portion <NUM>, and recessed portion <NUM>. As such, the sidewall surfaces that extend around sole portion <NUM> and sole portion <NUM> may be associated with multiple recessed portions.

In some embodiments, as discussed previously, the shape of a recessed portion may be determined according to the configuration or arrangement of sole portions bounding the recessed portion. As shown in <FIG>, sole portions are oriented to form a tri-star-shaped opening of recessed portion <NUM>. Recessed portion <NUM> may include an inner recessed surface <NUM>. Inner recessed surface <NUM> may be shaped in a tri-star configuration or a different shape that corresponds to the shape of a particular recessed portion. In some embodiments, each of the sole portions that border the recessed portion may abut inner recessed surface <NUM>.

In some embodiments, the sole portions may be separate pieces from inner recessed surface <NUM>. In some embodiments, the sole portions may be glued or otherwise secured to inner recessed surface <NUM>. In other embodiments, inner recessed surface <NUM> and the sole portions may be formed of unitary construction (e.g., inner recessed surface <NUM> may be continuous with the sidewalls of one or more sole portions). In some embodiments, the sole portions and inner recessed surface <NUM> may be molded, stamped, or otherwise formed from a unitary piece.

In some embodiments, the height or vertical dimension of the sidewall surfaces of the sole portions may define the depth of the recessed portions. The sidewall surfaces may extend from the inner recessed surface to an outer surface of sole structure <NUM>. For example, sidewall surface <NUM> extends from inner surface edge <NUM> to an outer junction edge <NUM> and an outer elevated surface edge <NUM> of sole structure <NUM>. That is, sidewall surface <NUM> extends from inner recessed surface <NUM> to outer surface <NUM>. In some embodiments, sidewall surface <NUM> extends completely around recessed portion <NUM>. In some embodiments, the height of sidewall surface <NUM> may vary along the perimeter or edge of a recessed portion and thereby define a recessed portion with a varying depth. In other embodiments, the height of sidewall surface <NUM> may remain constant throughout sole structure <NUM>.

In some embodiments, recessed portions may be associated with one or more colors. In some embodiments, the sidewall surfaces may include various colors. Additionally, in some embodiments, the inner recessed surface may include various colors. As depicted in <FIG>, sidewall surface <NUM> is multicolored. In first area <NUM> adjacent to inner recessed surface <NUM>, sidewall surface <NUM> has a first color. In second area <NUM> adjacent to an upper surface, sidewall surface <NUM> has a second color. In some embodiments, the first color may be different than the second color. In further embodiments, inner recessed surface <NUM> may have a third color. In some embodiments, the third color may be the same as the first color. In other embodiments, the third color may be the same as the second color. In still further embodiments, the third color may be different than both the first color and the second color.

As shown in <FIG>, dynamic portion <NUM> is multicolored. In other embodiments, a dynamic portion or a sole portion may have different colors or different layouts along different surfaces. In some embodiments, for example, sole portion <NUM> may have a different color scheme than sole portion <NUM> of dynamic portion <NUM>. Additionally, in some embodiments, the surface of first side <NUM> of dynamic portion <NUM> may have a different color than the color of second side <NUM>. Additionally, different portions along each side may have a different coloring layout or scheme. Therefore, different portions of a single recessed portion could have different coloring patterns.

As shown in <FIG>, additionally, the general shape of dynamic portion <NUM> is shown. As depicted, third elevated portion <NUM> and fourth elevated portion <NUM> have a generally triangular shape. Third elevated portion <NUM> and fourth elevated surface <NUM> are joined or connected by junction <NUM>. In some embodiments, the outer surface of junction <NUM> may be located at a lower height than the outer surface of the elevated portions. That is, the outer surface of junction <NUM> may be located along a different plane than the outer surface of the elevated portions. In some embodiments, the outer surface of junction <NUM> may be located at a smaller distance away from inner recessed surface <NUM> than the elevated portions. In other embodiments, the outer surface of junction <NUM> may be located at a similar height or plane at which the outer surfaces of the elevated portions are located. In other embodiments, the outer surface of junction <NUM> may be at a different height that is located closer to inner recessed surface <NUM>. By varying the height of the outer surface of junction <NUM>, the flexibility of sole structure <NUM> may be altered. For example, a larger junction may limit flexibility as an increased amount of material may be used to form sole structure <NUM>. In other embodiments, a thinner junction may allow for sole structure <NUM> to bend or flex to a greater degree as a thinner junction would use less material than a corresponding larger or thicker junction.

As shown, the elevated portions extend beyond junction <NUM>. In such embodiments, elevated portions may be oriented toward a ground or other surface during use. That is, the elevated portions may act as a ground-engaging surface.

Referring to <FIG>, a portion of sidewall surface <NUM> is depicted. As shown previously in <FIG>, sidewall surface <NUM> may bound or border recessed portion <NUM>, extending along a tri-star shape. In some embodiments, dynamic portion <NUM> may include base portion <NUM>. Base portion <NUM> may include base side surface <NUM> that extends from sole portion <NUM> to sole portion <NUM>. Base side surface <NUM> may form a part of sidewall surface <NUM>. In some embodiments, third elevated portion <NUM> and fourth elevated portion <NUM> may include elevated side surfaces. For example, elevated side surface <NUM> may extend along the side of third elevated portion <NUM>. Additionally, elevated side surface <NUM> may extend along the side of fourth elevated portion <NUM>. In some embodiments, elevated side surface <NUM> and elevated side surface <NUM> may be continuous or coincidental with base side surface <NUM>. In such embodiments, base side surface <NUM>, elevated side surface <NUM>, and elevated side surface <NUM> may form a generally seamless transition. Further, in such embodiments, a portion of an elevated side surface may bound or border a recessed portion.

Referring to <FIG>, alternate dynamic portions are depicted. Each of the dynamic portions has a different coloring layout. As shown in <FIG>, dynamic portion <NUM> has a unique color scheme. Dynamic portion <NUM> includes first area <NUM> of a first color. First area <NUM> extends from inner edge <NUM> toward outer edge <NUM>. First area <NUM> extends from inner edge <NUM> to an area below midline <NUM>. Second area <NUM> of a second color is located along dynamic portion <NUM> from first area <NUM> to outer edge <NUM>.

As shown in <FIG>, sole portion <NUM> has a different color scheme. By varying the color scheme, different patterns of display may be utilized throughout the sole structure. Additionally, by varying the color scheme, different colors may be visible depending on the degree to which the sole structure is bent. Sole portion <NUM> includes first area <NUM> of a first color. First area <NUM> extends from inner edge <NUM> toward outer edge <NUM>. As depicted, first area <NUM> extends from inner edge <NUM> to midline <NUM>. Second area <NUM> of a second color is located along sole portion <NUM> from first area <NUM> to outer edge <NUM>.

An alternate color scheme is depicted in sole portion <NUM> as shown in <FIG>. As shown, sole portion <NUM> includes first area <NUM> of a first color. First area <NUM> extends from inner edge <NUM> toward outer edge <NUM>. As depicted, first area <NUM> extends from inner edge <NUM> to an area past midline <NUM>. Second area <NUM> of a second color is located along sole portion <NUM> from first area <NUM> to outer edge <NUM>. In other embodiments, the coloring of the first area may extend over the outer surface of a junction. In still further embodiments, the coloring of the first area may extend to the sidewall surfaces of the triangular elevated portions. In still further embodiments, the first color may be located from between the inner edge to the outer edge of a sole portion.

In some embodiments, recessed portions may abut the edge or side of sole structure <NUM>. In some embodiments, the shape of a recessed portion may be adapted to accommodate variations in location or orientation of the recessed portion along sole structure <NUM>. Referring to <FIG>, recessed portion <NUM> includes first leg <NUM> and second leg <NUM>. Additionally, recessed portion <NUM> may include sipe <NUM> that extends from a central portion of recessed portion <NUM> to peripheral edge <NUM> of sole structure <NUM>. As used herein, the term "sipe" may refer to a slit, cut, or groove. The shape of recessed portion <NUM> is in contrast to other recessed portions that are located throughout sole structure <NUM>. For example, recessed portion <NUM> includes three legs that extend in a tri-star arrangement. Additionally, each of the legs of recessed portion <NUM> is angled from each other by approximately equal angles. Further, sipe <NUM> intersects leg <NUM>. In contrast, recessed portion <NUM> includes first leg <NUM> and second leg <NUM>. Further, sipe <NUM> intersects recessed portion <NUM> at central area <NUM>.

In some embodiments, the different configurations may cause sole structure <NUM> to react in different manners when subjected to a force at the different locations. For example, sole structure <NUM> may be able to expand to a greater degree at sipe <NUM> than at sipe <NUM>. Because recessed portion <NUM> is a larger void or opening than recessed portion <NUM>, as sole structure <NUM> is bent at recessed portion <NUM>, the surrounding portions may bend in toward the opening. This movement allows for sole structure <NUM> to bend a first amount at sipe <NUM>. Additionally, the larger void of recessed portion <NUM> may provide less resistance to bending because there is less material to resist stretching in the area of recessed portion <NUM> as compared to recessed portion <NUM>. In contrast, recessed portion <NUM> is smaller and therefore includes a greater amount of midsole component <NUM>. Sole structure <NUM> may therefore resist stretch to a greater degree at recessed portion <NUM> as compared to larger recessed portions intersected by sipes. A sole structure may therefore include variously shaped and sized recessed portions along the peripheral edge to tailor the stretch or bendability of a sole structure.

Referring particularly to recessed portion <NUM>, recessed portion <NUM> includes a slit or cut that extends from the junction of first leg <NUM> and second leg <NUM> to peripheral edge <NUM> of sole structure <NUM>. In some embodiments, sipe <NUM> extends along the full thickness of sidewall surface <NUM>. In other embodiments sipe <NUM> is deeper than the thickness of sidewall surface <NUM>. In still further embodiments, the depth of sipe <NUM> is less than the thickness of sidewall surface <NUM>. By varying the depth of sipe <NUM>, the amount of stretchability or expansion along peripheral edge <NUM> of sole structure <NUM> may be controlled. For example, in some embodiments, a deeper sipe may allow for the edge of sole structure <NUM> to expand a greater distance than in embodiments that utilized a shallower sipe.

In some embodiments, interior sidewall <NUM> of sipe <NUM> may have various color arrangements. In some embodiments, interior sidewall <NUM> may include a first color that is located adjacent to an interior edge <NUM> and a second portion located adjacent exterior edge <NUM>. That is, the area of the interior sidewall <NUM> adjacent to the ground-contacting surface or outer surface <NUM> may be a different color than the color that is located adjacent inner recessed surface <NUM> of recessed portion <NUM>.

In some embodiments, the interior sidewall may have various color configurations. For example, the interior sidewall <NUM> may have first color segment <NUM> located adjacent peripheral edge <NUM>. In some embodiments, second color segment <NUM> may extend from central edge <NUM> toward peripheral edge <NUM>. That is, second color segment <NUM> may extend along interior sidewall <NUM> from the location where sipe <NUM> intersects recessed portion <NUM> toward peripheral edge <NUM>. In some embodiments, second color segment <NUM> may extend completely across interior sidewall <NUM> from central edge <NUM> to peripheral edge <NUM>. In other embodiments, second color segment <NUM> may not fully extend across interior sidewall <NUM>.

In some embodiments, first color segment <NUM> may extend from interior edge <NUM> toward exterior edge <NUM>. In some embodiments, first color segment <NUM> may extend fully along interior sidewall <NUM> from interior edge <NUM> to exterior edge <NUM>. In other embodiments, first color segment <NUM> may not fully extend along interior sidewall <NUM> from interior edge <NUM> to exterior edge <NUM>. In some embodiments, first color segment <NUM> may extend from exterior edge <NUM> toward interior edge <NUM> along central edge <NUM>. In other embodiments, first color segment <NUM> may not fully extend from peripheral edge <NUM> to central edge <NUM>.

In some embodiments, as sole structure <NUM> is subjected to a tensile force, the peripheral edge of sole structure <NUM> may expand. As shown in <FIG>, as first side <NUM> of sipe <NUM> is moved away from second side <NUM> of sipe <NUM>, a greater portion of interior sidewall <NUM> may be visible. In some embodiments, this action may allow for some of sole portion <NUM> to be visible from a side view of sole structure <NUM> thereby exposing the different color arrangements along sole portion <NUM>.

The differences in color between sole portion <NUM> and interior sidewall <NUM> may be particularly selected to increase contrast and visibility during use. The color contrast of sole structure <NUM> may increase the visibility of the wearer in various lighting and environmental conditions. The colored portion may be selected to provide desired visual effects. In addition, the various colors may be utilized during product testing to enhance the visibility of areas of sole structure <NUM> that are subjected to tensile, compression, bending, or twisting forces. For example, the different color combinations may improve the degree to which areas of sole structure <NUM> may be captured with still image photography or video, such as high-speed film or other mediums that visually capture performance data during biomechanical or other forms of testing. Additionally, the different colors utilized in sole structure <NUM> may allow a viewer to determine the gait or any other aspects of how a user walks or runs. Additionally, the aesthetics of the sole may be altered by using the different coloring arrangements or patterns.

Embodiments may include provisions to enhance the flexibility of a sole with recessed portions arranged in an auxetic configuration. In some embodiments, the cuts or sipes along the periphery may allow for the sole structure to bend and twist, and the interior portion may provide stability that limits the amount that a sole structure may twist. By using both layouts, a sole structure may be formed that allows for a predetermined amount of twist and stretch while also providing for control over the sole structure.

In some embodiments, the peripheral edge along sole structure <NUM> may include plurality of sipes <NUM> that extend from the peripheral edge to a recessed portion. In some embodiments, each of the plurality of sipes <NUM> may extend into the recessed portion. In some embodiments, plurality of sipes <NUM> may partially surround or encompass central portion <NUM> (see <FIG>) that includes plurality of recessed portions <NUM>. As best shown in <FIG>, however, plurality of sipes <NUM> may not entirely encompass central portion <NUM>. For example, in some embodiments, sipes may not extend from toe edge <NUM>. The embodiment shown in <FIG>, as an example, may not include sipes extending from toe edge <NUM> in order to provide a stiffer or less flexible area along toe edge <NUM>. By not including sipes extending from toe edge <NUM>, the peripheral edge of sole structure <NUM> may be stiff or secure in this area. In other embodiments, however, sipes may extend from toe edge <NUM>.

In some embodiments, by extending each sipe into the recessed portion, the auxetic nature of the recessed portion may be affected. In some embodiments, the siped portion may be able to extend along a longitudinal direction when subjected to force without affecting the width of sole structure <NUM>. Additionally, by extending the sipe into a recessed portion, the attributes of the recessed portions may be coupled with the attributes of a sole structure that includes sipes. For example, the outer periphery of sole structure <NUM> may be able to bend or stretch without affecting the shape of the interior portion of sole structure <NUM>. Additionally, portions of sole structure <NUM> may still include an auxetic nature or feel. In this sense, the peripheral portion of sole structure <NUM> may act or be affected by force in a different manner than the interior portion of sole structure <NUM> when subjected to a force.

Additionally, by utilizing an auxetic central portion, the amount of material used may be reduced as compared to other sole structures without recessed portions. The auxetic central portion <NUM> may provide support and traction with limited material. Further, peripheral edge pieces <NUM> (see <FIG>) may provide a large surface area to interact with the ground or other surface to increase traction during cutting or lateral movements.

Referring to <FIG> and <FIG>, the color scheme of sole structure <NUM> may be different in different areas of sole structure <NUM>. For example, in some embodiments, the color scheme of forefoot region <NUM> may be different than the color scheme of heel region <NUM>. In some embodiments, different colors may be used in different regions for various purposes including aesthetic appeal, contrast for viewing, or to coordinate the sole structure with a certain camera or the like such that the movement of the article may be readily ascertainable during the use of sole structure <NUM>.

Referring to <FIG>, an isometric cut portion through heel region <NUM> is shown. Portion <NUM> is shown that cuts through a portion of three recessed portions. As shown, first color portion <NUM> extends along sidewall surface <NUM> that extends around the recessed portions.

In some embodiments, as discussed previously, a color may extend along a portion of sidewall surfaces. As shown in <FIG>, first color segment <NUM> of sidewall surface <NUM> includes a different color than second color segment <NUM> of sidewall surface <NUM>.

Additionally, in some embodiments, a portion of peripheral edge piece <NUM> may have a different color arrangement than the color or the interior portion of sole structure <NUM>. For example, in some embodiments, the peripheral edge may be white. In some embodiments, as peripheral edge piece <NUM> extends toward central portion <NUM>, the color of peripheral edge piece <NUM> may be altered. For example, in some embodiments, peripheral edge piece <NUM> may have a white cross section. In other embodiments, a different color may be utilized. In some embodiments, the inner recessed surface may also be different than various areas of the recessed portions. For example, in some embodiments, inner recessed surface <NUM> of recessed portion <NUM> may be orange while a sidewall portion of recessed portion <NUM> may be white. In different embodiments, various combinations of colors and orientations may be utilized.

Referring particularly to <FIG>, multiple colors may be utilized in particular areas of sole structure <NUM>. As shown in <FIG>, forefoot region <NUM> of sole structure <NUM> utilizes multiple colors throughout the width of sole structure <NUM>. For example, recessed portion <NUM> includes first color portion <NUM> that is a first color, for example, orange. Additionally, second color portion <NUM> is a different color, for example, blue. In some embodiments, first color portion <NUM> may match the color of second color portion <NUM>. Additionally, in some embodiments, the color of second color portion <NUM> may extend along elevated portions along sole structure <NUM>. Additionally, a third color may extend along the periphery of sole structure <NUM>. For example, peripheral edge pieces <NUM> of sole structure <NUM> may be white.

In some embodiments, another color may be located in recessed portion <NUM> that is located adjacent to recessed portion <NUM>. For example, in some embodiments, third color portion <NUM> of recessed portion <NUM> may be the same color as first color portion <NUM> of recessed portion <NUM>. Fourth color portion of recessed portion <NUM> may be a fourth color, for example, teal. In some embodiments, the color arrangement throughout the recessed portions may be different. By orienting the colors in specific patterns, different designs may be used throughout sole structure <NUM> that may assist in identifying how certain portions of sole structure <NUM> act when subjected to various forces.

<FIG> and <FIG> illustrate bottom isometric views of another embodiment of sole structure <NUM>. Specifically, <FIG> illustrates a bottom isometric view of sole structure <NUM> in an uncompressed state, while <FIG> illustrates a bottom isometric view of sole structure <NUM> in a compressed state. Specifically, <FIG> shows sole structure <NUM> deforming under vertically oriented compression forces <NUM> (i.e., forces generally perpendicular to the sole surface, or to the longitudinal and lateral directions of the sole). As with previous embodiments, sole structure <NUM> includes midsole component <NUM> and a plurality of outer sole members.

In the embodiment of <FIG> and <FIG>, plurality of recessed portions <NUM> are shown in compressed and in uncompressed states. In some embodiments, compressing a sole structure with recessed portions arranged in an auxetic configuration can act to close the recessed portions of the sole structure as the sole portions around the recessed portions expand under compression. As seen, for example, in <FIG>, the opening size or cross-sectional area of plurality of recessed portions <NUM> decreases during the application of vertically oriented compression forces <NUM>. In some cases, some recessed portions may completely close while other recessed portions may only partially close. For example, depression <NUM> may not compress as much as other recessed portions in sole structure <NUM>. Depression <NUM> may not be the same depth as the other recessed portions and therefore may not experience the auxetic effect to as great an extent as the other recessed portions.

Referring to <FIG> and <FIG>, a side view of article <NUM> is shown in a relaxed state, and when subjected to a force. In <FIG>, article <NUM> is shown in a bent formation that may be a typical formation when used by a wearer. In some embodiments, when viewed from a side view, sole structure <NUM> may not expose an interior surface. That is, in some embodiments, the sidewall surfaces of recessed portions may not be visible from a side view.

In some embodiments, the exposed side of sole structure <NUM> may be uniform in color. In other embodiments, the side of sole structure <NUM> may have different colors along the side of sole structure <NUM>. As shown in <FIG>, sole structure <NUM> is formed of a single color with no reveals to the interior portion of sole structure <NUM>. Additionally, as shown in the configuration of <FIG>, sipe <NUM> is in a closed or relaxed state. In this state, sipe <NUM> does not experience a large quantity of longitudinal force. Therefore, the edges of sipe <NUM> do not extend away from one another in a relaxed state and therefore may hide the interior sidewall surfaces of the recessed portions of sole structure <NUM>.

Referring to <FIG>, article <NUM> is shown in a bent position. In some embodiments, as sole structure <NUM> is bent, a sipe may expand or stretch, in a similar manner as depicted in <FIG>. In some embodiments, as sipe <NUM> is expanded, a portion of the interior sidewall surfaces of sole structure <NUM> may be visible from a side view. In some embodiments, colored portion <NUM> or contrasting portion of the interior sidewall surfaces may be visible. In such embodiments, the contrast between the exterior side surface coloring and the interior region sidewall surface may increase visibility of a particular section or region of sole structure <NUM> during use. This contrast may allow for a camera or other visual-capturing device to be able to readily ascertain where various portions of sole structure <NUM> are located during use for studying or research. Further, the contrast may also increase the ease at which various apertures may expand or contract during use in various conditions and with various configurations.

Referring to <FIG>, various cross sections of sole structure <NUM> are shown. Central portion <NUM> of sole structure <NUM> includes plurality of recessed portions <NUM> that extend throughout central portion <NUM>. As discussed previously, plurality of recessed portions <NUM> are bordered by sole portions that include elevated portions. In other embodiments, some portions of central portion <NUM> may not include elevated portions. For example, in some embodiments, a portion of central portion <NUM> may not include an auxetic shape or recessed portion. In such areas of sole structure <NUM>, an elevated portion may not be present.

In some embodiments, an elevated portion may be located adjacent to a peripheral edge piece. Peripheral edge pieces <NUM> surround central portion <NUM>. The height of the peripheral edge pieces is greater than the absolute height of an elevated portion. Referring to enlarged cross-section <NUM>, the distance from upper surface <NUM> of sole structure <NUM> to outer surface <NUM> of peripheral edge piece <NUM> is greater than the distance from upper surface <NUM> of sole structure <NUM> to outer surface <NUM> of elevated portion <NUM>. That is, distance <NUM> is larger than distance <NUM>. In some embodiments, the distance from an inner recessed surface to an outer surface may be different between peripheral edge pieces and the elevated portions. For example, distance <NUM> between inner recessed surface <NUM> and outer surface <NUM> may be greater than distance <NUM> between inner recessed surface <NUM> and outer surface <NUM>. Additionally, in some embodiments, the peripheral edge pieces may be larger around heel region <NUM>. Therefore, as shown, peripheral edge piece <NUM> may also be larger than the portions of sole structure <NUM> within central portion <NUM>. In other embodiments, the outer surfaces of peripheral edge pieces <NUM> may be the same distance away from inner recessed surface <NUM> along heel region <NUM>.

In embodiments in which distance <NUM> is larger than distance <NUM>, peripheral edge pieces <NUM> may be oriented to contact a ground surface before elevated portions of central portion <NUM> during normal use of sole structure <NUM>. In some embodiments, orienting peripheral edge pieces <NUM> to contact the ground before central portion <NUM> may cause sole structure <NUM> to contact the ground in a particular manner. As sole structure <NUM> contacts the ground, the peripheral edge pieces may contact the ground first. As the user steps, the central portion of sole structure <NUM> may then contact the ground. This gap or distance between the outer surfaces of the peripheral edge pieces and the outer surfaces of the elevated portions may provide additional cushion or support in the areas of the sole structure that include this arrangement. By orienting the peripheral edge pieces to contact the ground first, some of the force from contacting the ground may be redistributed or absorbed before the rest of the weight of the user extends into the central portion of sole structure <NUM>. Therefore, the peripheral edge pieces may assist in providing support and cushioning to a wear during use of sole structure <NUM>.

In other areas of sole structure <NUM>, the outer surfaces or ground-contacting surfaces of peripheral edge pieces <NUM> of sole structure <NUM> may be located along approximately the same plane as the outer surfaces or ground-contacting surfaces of the elevated portions. That is, in some embodiments, the ground-contacting surfaces of the peripheral edge pieces and the ground-contacting surfaces of the elevated portions may contact the ground or other surface at approximately the same time during use by a wearer.

In some embodiments, orienting the ground-contacting surface of the peripheral edges along the same plane as the elevated portions may assist in providing feedback to a user. Referring to enlarged portion <NUM>, outer surface <NUM> of peripheral edge piece <NUM> is located a distance <NUM> away from upper surface <NUM> of sole structure <NUM>. Additionally, outer surface <NUM> is located a distance <NUM> away from inner recessed surface <NUM>. Outer surface <NUM> of elevated portion <NUM> is located a distance <NUM> away from upper surface <NUM> of sole structure <NUM>. Additionally, outer surface <NUM> is located a distance <NUM> away from inner recessed surface <NUM>. In some embodiments, distance <NUM> and distance <NUM> may be approximately the same. In some embodiments, distances <NUM> and distance <NUM> may be approximately the same. Additionally, peripheral edge piece <NUM> may also be approximately the same size as peripheral edge piece <NUM>. Therefore, central portion <NUM> of forefoot region <NUM> may be circumscribed by peripheral edge pieces of approximately the same height. In some embodiments, the orientation of the peripheral edges and the elevated portions at the same height may allow for a user to have quick feedback to actions as well as feedback regarding the condition of the surface that the ground-contacting surface contacts by engaging a large percentage of the surface area of sole structure <NUM> with the ground as quickly as possible.

In some embodiments, the different levels of peripheral edges and elevated portions may be located throughout sole structure <NUM>. For example, in some embodiments, the ground-contacting surface of peripheral edge pieces <NUM> may extend beyond the ground-contacting surface of the elevated portions in a heel region. Additionally, in the same sole structure, the ground-contacting surface of the peripheral edge pieces and the ground-contacting surface of the elevated portions may be located along the same plane. The location and orientation of the ground-contacting surfaces may be altered in different areas of the sole structure to particularize the comfort and feel of the sole structure. For example, heel region <NUM> may include greater cushioning, while forefoot region <NUM> may require more control for cutting or other motions. Therefore, heel region <NUM> may include a peripheral edge piece that includes a ground-contacting surface that extends beyond the surface of the elevated portions while other areas of sole structure <NUM> may have different configurations.

Other embodiments of the various sole structures disclosed in the present application may utilize any of the features, provisions, components, functionalities and/or materials that are disclosed in U. Patent Application Number _____, filed August <NUM>, <NUM> (currently U. Patent Publication Number ______), titled "Sole Structure Including Sipes," (Attorney Docket No. <NUM>-<NUM>). Further, other embodiments of the sole structures disclosed in the present application may utilize any of the features, provisions, components, functionalities and/or materials that are disclosed in U. Patent Application Number _____, filed August <NUM>, <NUM> (currently U. Patent Publication Number _______), titled "Sole Structures with Regionally Applied Auxetic Openings and Siping," (Attorney Docket No. <NUM>-<NUM>).

Furthermore, any of the embodiments of the present application could incorporate any of the features, provisions, components, functionalities and/or materials disclosed in any of the following U. Applications: <CIT> (currently U. Patent Publication Number _______ ), titled "Sole Structure with Holes Arranged in Auxetic Configuration," (Attorney Docket No. <NUM>-<NUM>); <CIT> (currently U. Patent Publication Number _____), titled "Multi-Component Sole Structure Having an Auxetic Configuration" (Attorney Docket No. <NUM>-<NUM>); and <CIT> (currently U. Patent Publication Number _______), titled "Midsole Component and Outer sole Members with Auxetic Structure" (Attorney Docket No. <NUM>-<NUM>).

Claim 1:
A sole structure (<NUM>), comprising:
a midsole component (<NUM>) with a forefoot region (<NUM>), a midfoot region (<NUM>), and a heel region (<NUM>);
an upper surface (<NUM>);
a central portion (<NUM>) that includes a plurality of recessed portions (<NUM>) that are arranged in an auxetic configuration and extend throughout the central portion (<NUM>), the plurality of recessed portions (<NUM>) being bordered by sole portions that include elevated portions (<NUM>); and
peripheral edge pieces (<NUM>, <NUM>, <NUM>) that surround the central portion (<NUM>),
wherein a distance (<NUM>) from the upper surface (<NUM>) of the sole structure <NUM> to an outer surface (<NUM>) of the peripheral edge piece (<NUM>) is greater than a distance (<NUM>) from the upper surface (<NUM>) of the sole structure (<NUM>) to an outer surface (<NUM>) of the elevated portions (<NUM>).