Patent Publication Number: US-9839259-B2

Title: Adhesive, washable, antimicrobial insert liner for shoes and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims priority to and the benefit of U.S. Provisional Application Ser. No. 61/709,087, filed Oct. 2, 2012, the entire contents of which are herein incorporated by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates generally to an insert liner sock for a shoe, and more particularly to a removable insert liner sock and a method of manufacturing the same. 
     BACKGROUND 
     Certain types of shoes are commonly worn without socks, such as casual loafers, flats, dress shoes, boat shoes, etc. However, wearing shoes without socks can produce a bad odor from bacteria buildup caused by moisture generated by the user&#39;s sweaty feet. Additionally, wearing shoes without socks may cause the user&#39;s foot to slip around in the shoe due to moisture buildup. Moreover, the user&#39;s foot may uncomfortably stick to the inside of the shoe due to the production of moisture by the user&#39;s foot. 
     Conventional apparatuses may include low-cut socks, such as “loafer socks,” which may provide the appearance that the user is not wearing socks. However, such conventional low-cut socks may inadvertently slip off the user&#39;s foot, such as when the user removes the shoe, because the socks do not extend up around the user&#39;s ankle. Moreover, such low-cut socks may inconveniently require frequent adjustment by the user to prevent the socks from slipping off the user&#39;s lower ankles and heels. Furthermore, conventional low-cut socks may include an additional mechanism for securing the socks to the user&#39;s ankles, such as an elastic band or hook and loop fasteners. These mechanisms, however, may be uncomfortable or unseemly. Additionally, these mechanisms require the user to locate and dress such low-cut socks each time the user wishes to wear shoes with low-cut socks. Other conventional solutions may include applying powder to the interior cavity of the shoe to absorb excess moisture from the user&#39;s foot. However, applying powder to the interior cavity of the user&#39;s shoes may require multiple applications per day, which creates additional expense and increases the user&#39;s inconvenience. Additionally, it may be cumbersome or awkward for the user to carry a bottle of powder around such that the powder is readily accessible for multiple reapplications throughout the day. 
     As a result, there is a need for a removable insert liner or low-cut sock configured to be detachably adhered to an interior cavity of a shoe such that the user can comfortably wear shoes without socks. There is also a need for an insert liner or low-cut sock which is configured to be removed from the shoe, machine washed, and subsequently re-adhered to the interior cavity of the shoe until the user desires to wash the insert liner or sock again. There is also a need to provide an odor killing antimicrobial adhesive liner configured to wick moisture away from the user&#39;s foot, thereby allowing the user to keep the insert liner inside the shoe for numerous wears without needing to wash the insert liner. 
     SUMMARY 
     The present disclosure is directed to an antimicrobial shoe insert liner which is configured to detachably adhere to an interior cavity of a shoe. In one embodiment, the shoe insert liner includes a liner having an exterior surface and an adhesive bonded to at least a portion of the exterior surface of the liner. The liner includes a longitudinal portion, opposing first and second lateral portions extending in a first direction from opposite sides of the longitudinal portion, and opposing front and rear portions extending in the first direction from opposite ends of the longitudinal portion. Together, the longitudinal, lateral, front, and rear portions of the liner define an opening configured to receive a user&#39;s foot. The shoe insert liner may be configured to fit into any type of shoe, such as, loafers, boat shoes, slip on shoes, formal work shoes, oxfords, flats, etc. The adhesive may be any suitable type of adhesive, such as polyurethane or silicone. In one embodiment, the adhesive may be a gel adhesive. Any suitable portion of the liner may include adhesive. In one embodiment, only a portion of the front portion of the liner includes adhesive. In another embodiment, no portion of the front portion of the liner includes adhesive. In one embodiment, the adhesive includes pores configured to provide ventilation. Additionally, the liner may be comprised of any suitable material. In one embodiment, the liner comprises an elastomeric material. In another embodiment, the liner comprises a fabric configured to wick moisture away from the user&#39;s foot. In yet another embodiment, approximately 5 to 100 percent of the liner comprises an antimicrobial material. In a further embodiment, the shoe insert liner also includes a removable protective sheet covering the adhesive. 
     The present disclosure is also directed to a shoe assembly. In one embodiment, the shoe assembly includes a shoe having an interior cavity and a shoe insert liner configured to be releasably adhered to at least a portion of the interior cavity of the shoe. The interior cavity of the shoe defines a pair of opposing sidewalls, a heel portion, a toe portion opposite the heel portion, a tongue portion, an insole portion extending between the toe and heel portions, and a collar portion extending around a periphery of an opening configured to receive a user&#39;s foot. The shoe insert liner includes a liner having an exterior surface and an adhesive bonded to at least a portion of the exterior surface of the liner. In one embodiment, when the shoe insert liner is releasably adhered to the interior cavity of the shoe, the shoe insert liner extends below the collar portion of the shoe. In one embodiment, the shoe insert liner is releasably adhered to the heel, sidewall, insole, and tongue portions of the shoe. In another embodiment, the shoe insert liner is releasably adhered to the tongue portion of the shoe and the shoe insert liner is not adhered to the toe portion of the shoe such that a front portion of the shoe insert liner is configured to stretch forward toward the toe portion of the shoe when a user&#39;s foot is inserted into the shoe insert liner. In one embodiment, when the shoe insert liner is removed from the shoe, substantially no adhesive material remains bonded to the interior cavity of the shoe or bleeds onto the interior cavity of the shoe. 
     The present disclosure is also directed to a method of manufacturing a shoe insert liner. In one embodiment, the method includes fabricating a fabric layer, applying adhesive to portions of the fabric layer, and curing the adhesive to form the shoe insert liner. In one embodiment, fabricating the fabric layer includes knitting the fabric layer on a sock knitting machine. In one embodiment, applying adhesive to portions of the fabric layer includes dressing the fabric layer on a mold, masking portions of the fabric layer, and spraying unmasked portions of the fabric layer with an adhesive gel using a meter mix automated spray coating machine. In another embodiment, applying adhesive to portions of the fabric layer includes dressing the fabric layer on a mold, masking portions of the fabric layer, and passing the fabric layer through a multiple station meter mix dispense coating system that applies an adhesive gel to the fabric layer. In another embodiment, no masking is necessary given the accuracy of the spray coating machine. In another embodiment, fabricating the fabric layer includes trimming a sheet material, such as by die cutting, to form a flat pattern. A periphery of the flat pattern includes a plurality of seam lines that are configured to be connected together, such as by stitching, to form the shoe insert liner. In one embodiment, the method of manufacturing a shoe insert liner also includes applying a release liner to the adhesive. 
     This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used in limiting the scope of the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments of insert liners for a shoe and methods of manufacturing the same are described with reference to the following figures. The same reference numerals are used throughout the figures to reference like features, components, and method steps. 
         FIG. 1A  is a top view of an insert liner detachably bonded to an interior cavity of a shoe according to an embodiment of the present disclosure; 
         FIG. 1B  is a perspective view of the insert liner and the shoe of  FIG. 1A , with a tongue portion of the shoe omitted to reveal a toe portion of the insert liner; 
         FIGS. 2A and 2B  are front and rear perspective views, respectively, of the insert liner of  FIG. 1A ; 
         FIG. 3A  is a perspective view of a user&#39;s foot partially inserted into the insert liner and shoe of  FIG. 1B ; 
         FIG. 3B  is a perspective view of a user&#39;s foot fully inserted into the insert liner and shoe of  FIG. 1B , showing the insert liner stretched to conform to the user&#39;s foot; 
         FIG. 4  is a flowchart showing steps of manufacturing a shoe insert liner according to an embodiment of the present disclosure; 
         FIG. 5  is a flowchart showing steps of manufacturing a shoe insert liner according to another embodiment of the present disclosure; and 
         FIG. 6  is a top view of a flat pattern layout of an insert liner according to an embodiment of the invention showing the seam pattern of the inner liner prior to final assembly. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention relates to an insert liner for a shoe, and more particularly to a detachable insert liner and a method of manufacturing the same. The shoe insert liner is configured to detachably adhere to the interior cavity of the shoe with the application of positive pressure. The shoe insert liner is configured to generally conform to the contour of at least a portion of the interior cavity of the shoe. The shoe insert liner is secured to at least a portion of the interior cavity of the shoe with a temporary bond, such that the user may detach the insert liner from the shoe as desired. Moreover, the shoe insert liner may be removed from the interior cavity of the shoe and subsequently re-inserted without the need to apply additional adhesive material. Additionally, the adhesive shoe insert liner is machine-washable such that the insert liner retains its adhesive properties after washing. The shoe insert liner may also be configured to be completely recessed in the interior cavity of the shoe such that the shoe insert liner does not extend above a collar portion of the shoe, which tends to conceal the shoe insert liner from view by other individuals. In one embodiment, the shoe insert liner is configured to wick moisture away from the user&#39;s foot. In a further embodiment, the shoe insert liner may be comprised of an antimicrobial material. The shoe insert liner may be provided in various shapes and sizes such that the insert liner is configured for use with a variety of different shoes, such as loafers, dress shoes, boots, oxford shoes, women&#39;s flats, high heels, etc. 
     With reference now to  FIGS. 1A-2B , a shoe insert liner  100  according to an embodiment of the present invention is illustrated. The shoe insert liner  100  comprises a fabric layer  101  and a pressure-sensitive adhesive layer  102  bonded to at least a portion of an exterior surface of the fabric layer  101 . It will be appreciated that the pressure-sensitive adhesive layer  102  is configured to detachably adhere the shoe insert liner  100  to the interior cavity  103  of a shoe  104 , and the fabric layer  101  is configured to wick moisture away from the user&#39;s foot and provide comfort to the user. In one embodiment, the shoe insert liner  100  comprises a longitudinal portion  105 , opposing lateral portions  106 ,  107  extending upward from opposite sides of the longitudinal portion  105 , and opposing front and rear portions  108 ,  109  extending upward from opposite ends of the longitudinal portion  105 . As described in detail below with reference to  FIG. 5 , forward edges of the lateral portions  106 ,  107  of the liner  100  are connected to the front portion  108  by any suitable means, such as stitching. Similarly, rear edges of the lateral portions  106 ,  107  of the liner  100  are connected to the rear portion  109  by any suitable means. In one or more alternate embodiments, the liner  100  may be made via a sock knitting machine, thereby eliminating the need for any additional stitching. Connecting the lateral portions  106 ,  107  to the front portion  108  and the rear portion  109  forms a cavity  110  configured to receive the user&#39;s foot through an opening  111 . 
     The shoe insert liner  100  of the present disclosure is configured to be received in the interior cavity  103  of the shoe  104 . The interior cavity  103  of the shoe  104  comprises opposing short sidewalls  131 ,  132 , forward toe and tongue portions  133 ,  130 , respectively, a rear heel portion  134 , and a bottom/insole portion  135  extending longitudinally between the toe and heel portions  133 ,  134  and extending laterally between lower ends of the opposing sidewalls  131 ,  132 . When the shoe insert liner  100  is inserted into the interior cavity  103  of the shoe  104 , the longitudinal, lateral, front, and rear portions  105 ,  106 ,  107 ,  108 ,  109 , respectively, of the liner  100  are configured to substantially conform to the sole, sidewall, tongue, and heel portions of the shoe  104 , respectively. In one embodiment, the insert liner  100  extends from an upper edge of the tongue portion  130  of the shoe  104  to a region approximately midway between the toe portion  133  and the upper edge of the tongue portion  130  of the shoe  104 . In an alternate embodiment, the liner  100  may cover the entire portion of the interior cavity  103  extending between the toe portion  133  and the upper edge of the tongue portion  130  of the shoe  104 . It will be appreciated, however, that the liner  100  may be configured to extend any desired amount between the toe  133  and tongue  130  portions of the shoe  104 . 
     Moreover, as described in more detail below, the adhesive  102  may be applied to any desired amount of the fabric layer  101 . The contact between the adhesive layer  102  and the interior cavity  103  of the shoe  104  detachably adheres the liner  100  to the shoe  104 . In the illustrated embodiment of  FIGS. 2A and 2B , the adhesive  102  is applied to the rear portion  109 , the opposing lateral portions  106 ,  107 , and only a portion of the front portion  108  of the fabric layer  101 . In the illustrated embodiment, the adhesive  102  is applied only to the portion of the front portion  108  which engages the tongue portion  130  of the shoe  104  when the insert liner  100  is inserted into the interior cavity  103  of the shoe  104 . In the illustrated embodiment, the adhesive  102  is not applied to the front portion  108  of the fabric layer  101  which corresponds to the toe portion  133  of the shoe  104 . This permits the front portion  108  of the shoe insert liner  100  to stretch forward as the user&#39;s foot is inserted into the cavity  110  of the insert liner  100 , as illustrated in  FIGS. 3A and 3B . That is, the portion of the front portion  108  of the fabric liner  100  corresponding to the toe portion  133  of the shoe  104  may be free of any adhesive  102  such that the front portion  108  is configured to function in the same manner as a toe section of a conventional dress sock or no-show sock. Accordingly, in the embodiment illustrated in  FIG. 1B , the front portion  108  of shoe insert liner  100  is spaced apart from the toe portion  133  of the shoe  104  when a user&#39;s foot is not inserted into the cavity  110  of the shoe insert liner  100 . Then, as the user&#39;s foot is inserted into the interior cavity  110  of the shoe insert liner  100 , the front portion  108  of the insert liner  100  is configured to stretch forward toward the toe portion  133  of the shoe  104 , thereby conforming to the shape of the user&#39;s foot thus allowing the fabric layer  101  to grip the user&#39;s foot tightly which enhances the wicking and antimicrobial abilities of the yarns.  FIG. 3A  illustrates a user&#39;s foot enter the shoe insert liner  100  with the front portion  108  unstretched, and  FIG. 3B  illustrates the front portion of the shoe insert liner  100  stretched around the user&#39;s foot when the user&#39;s foot is fully inserted into the shoe insert liner  100  and shoe  104 . Additionally, the adhesive  102  on the front portion  108  of the shoe insert liner  100  adheres to the tongue portion  130  of the shoe  104  and thereby maintains the opening  111  in the shoe insert liner  100  such that the user&#39;s bare foot may be readily inserted into the cavity  110  of the shoe insert liner  100 . Furthermore, the adhesive bond between the shoe insert liner  100  and the tongue portion  130  of the shoe  104  provides a counter-pulling force as the user&#39;s foot is inserted into the cavity  110  in the shoe insert liner  100 , thereby allowing the front portion  108  of the shoe insert liner  100  to be stretched snuggly around the user&#39;s foot (i.e., the shoe insert liner  100  is configured to remain adhered to the tongue portion  130  of the shoe  104  as the user&#39;s foot is inserted into the cavity  110  of the shoe  104  such that the front portion  108  of the shoe insert liner  100  may stretch toward the toe portion  133  of the shoe  104  and thereby conform to a portion of the user&#39;s foot). 
     In one embodiment, between approximately 5% and approximately 100% of the fabric layer  101  comprises an antimicrobial material. It will be appreciated, however, that the proportion of the fabric layer  101  comprising antimicrobial material is not limited to the amounts recited above, and any desired amount of antimicrobial material may be provided depending upon the conditions in which the shoe insert liner  100  will be used. In one embodiment, the fabric layer  101  comprises a material configured to wick moisture away from the user&#39;s foot. In another embodiment, the fabric layer  101  comprises an elastomeric material, such as spandex. In one embodiment, approximately 5% of the fabric layer  101  comprises spandex. It will be appreciated, however, that the fabric layer  101  may be comprised of a greater or lesser proportion of elastomeric material depending upon the desired elasticity of the shoe insert liner  100 . 
     In one embodiment, the adhesive layer  102  comprises silicone adhesive. In another embodiment, the adhesive layer  102  comprises a cured silicone rubber gel with a tacky surface. In another embodiment, the adhesive layer  102  comprises a two-part polyurethane gel. The two-part polyurethane gel adhesive  102  cures with a tacky surface configured to releaseably adhere the shoe insert liner  100  to the shoe  104 . The two-part polyurethane gel adhesive  102  may also be configured to cure with sufficient hardness to maintain the general shape of the shoe insert liner  100  (i.e., the polyurethane gel adhesive layer  102  may be configured to maintain the shape of the insert liner  100  such that it generally matches the shape of the interior cavity  103  of the shoe  104  even when the shoe insert liner  100  is removed from the shoe  104 ). In one embodiment, when the shoe insert liner  100  is detached from the shoe  104 , substantially no adhesive remains on the shoe  104  or bleeds onto the interior cavity  103  of the shoe  104 . Additionally, in one embodiment, the adhesive  102  includes a plurality of small holes or pores  136  configured to provide ventilation for the user&#39;s foot (i.e., the pores  136  in the adhesive layer  102  are configured to permit air to circulate to the user&#39;s foot). The pores  136  may be provided along any portions of the adhesive layer  102  where ventilation is desired, such as, for instance, in the portion of the adhesive layer  102  provided along the longitudinal portion  105  of the shoe insert liner  100 , as illustrated in  FIG. 6 . The pores  136  may also be provided in the portion of the adhesive layer  102  provided along the rear portion  109 , the opposing lateral portions  106 ,  107 , and/or the front portion  108  of the shoe insert liner  100 . 
     With reference again to the embodiment illustrated in  FIG. 1B , the shoe insert liner  100  of the present invention may be configured not to extend above a collar portion  125  of the shoe  104  when the shoe insert liner  100  is adhered to the interior cavity  103  of the shoe  104  (i.e., the shoe insert liner  100  may be configured to extend slightly below an upper edge  126  of the collar portion  125  of the shoe  104 ). Recessing the shoe insert liner  100  below the upper edge  126  of the collar portion  125  of the shoe  104  tends to conceal the shoe insert liner  100  from view by other individuals. That is, the shoe insert liner  100  may be configured such that the shoe insert liner  100  is not visible during use. In this way, the shoe insert liner  100  is configured to maintain the desired sockless appearance. 
     The shoe insert liner  100  of the present disclosure may be adhered to the interior cavity  103  of the shoe  104  without the aid of an applicator device. In one embodiment, the user may use his or her hand to place the shoe insert liner  100  into the shoe  104  much like a conventional arch support and then supply the pressure necessary to detachably adhere the pressure-sensitive adhesive layer  102  of the shoe insert liner  100  to the interior walls of the shoe  104 . In one embodiment, the user may then insert his or her foot into the cavity  110  of the shoe insert liner  100  and then step into the shoe  104 . The user may then move his or her foot in multiple directions to apply the requisite pressure to detachably adhere the shoe insert liner  100  to the shoe  104 . The user may alternately use his or her hand to apply the necessary pressure to detachably adhere the shoe insert liner  100  to the interior cavity  103  of the shoe  104 . It will be appreciated that in the embodiment in which the front portion  108  of the shoe insert liner  100  is not configured to adhere to the toe portion  133  of the shoe  104 , the user needs to apply pressure only to the rear portion  109 , the longitudinal portion  105 , the lateral portions  106 ,  107 , and a portion of the front portion  108  of the shoe insert liner  100 , such that the shoe insert liner  100  is adhered to the heel portion  134 , the insole/bottom portion  135 , the sidewall portions  131 ,  132 , and the tongue portion  130 , respectively, of the interior cavity  103  of the shoe  104 . 
     Referring now to  FIG. 4 , a flowchart illustrating a method  200  of manufacturing a shoe insert liner  100  according to one embodiment of the present disclosure is provided. In the illustrated embodiment, the method  200  includes a task  210  of fabricating a fabric layer  101 . The task  210  of fabricating the fabric layer  101  may be performed by any suitable means, such as, for instance, knitting on a sock knitting machine. The method  200  also includes a task  220  of applying an adhesive layer  102  to the fabric layer  101 . The task  220  of applying an adhesive layer  102  to the fabric layer  101  may be performed by any suitable means. In one embodiment, the task  220  includes dressing the fabric layer  101  onto a mold in the shape of an interior cavity  103  of a shoe  104 . The mold also includes an exterior mask that covers any portions of the fabric layer  101  that are not to receive the adhesive layer  102 . The task  220  of applying the adhesive layer  102  to the fabric layer  101  also includes placing the fabric layer  101 , which is dressed on the masked mold, onto an inline conveyer. The inline conveyor is configured to transport the mold and fabric layer  101  toward a robotic arm and a multi-axis automated spray machine. When the masked mold and fabric layer  101  arrives at the spray machine, the robotic arm lifts the masked mold and fabric layer  101  into a spray zone of the automated spray machine. The automated spray machine then sprays the fabric layer  101  with an adhesive gel material, such as, for instance, silicone or polyurethane. In an alternate embodiment, the fabric layer  101 , which is dressed on the masked mold, is passed into a dispensing zone where a meter mixed dispense coating system coats different sides and contours of the fabric layer  101  in different stages. It will be appreciated that the adhesive gel material will only be applied to those portions of the fabric layer  101  that are not covered by exterior mask on the mold. In one embodiment, exterior mask is configured such that the adhesive gel material is only applied to the rear portion  109 , the longitudinal portion  105 , the lateral portions  106 ,  107 , and a portion of the front portion  108  of the shoe insert liner  100  that corresponds to the tongue portion  130  of the shoe  104 , as illustrated in  FIGS. 2A and 2B . In one or more alternate embodiments, the exterior mask on the mold may have any other suitable configuration such that any other suitable portions of the fabric layer  101  will receive adhesive  102 . Additionally, the mask may be configured such that a plurality of small holes or pores  136  are formed in the adhesive layer  102  to provide ventilation for the user&#39;s foot, as described above and illustrated in  FIG. 6 . The method  200  also includes a task  230  of curing the adhesive layer  102  on the fabric layer  101  to form the completed shoe insert liner  100 . In one embodiment, the task  230  of curing the adhesive layer  102  includes placing the mold, onto which the adhesive coated fabric layer  101  is dressed, onto an inline conveyer oven. Placing the mold and adhesive coated fabric layer  101  onto the inline conveyor oven may be performed by any suitable means, such as, for instance, manually or mechanically, such as with an automated robotic arm. 
     With reference now to  FIG. 5 , a flowchart illustrating a method  300  of manufacturing a shoe insert liner  100  according to another embodiment of the present disclosure is provided. In the illustrated embodiment, the method  300  includes a task  310  of unfurling fabric sheets from a spool and feeding the fabric sheets through an adhesive coating machine. The adhesive coating machine applies an adhesive  102 , such as silicone or polyurethane, to one side of the fabric layer  101 . In one embodiment, the opposite side of the fabric layer  101  is not coated such that one side of the fabric layer  101  remains exposed. As described above, exposing one side of the fabric layer  101  promotes wicking moisture away from the user&#39;s foot during use of the shoe insert liner  100 . In one embodiment, the adhesive  102  covers substantially all of one side of the fabric layer  101  (i.e., the adhesive layer  102  may be substantially coextensive with the fabric layer  101 ). In an alternate embodiment, the adhesive layer  102  may be applied only to localized regions of one side of the fabric layer  101 . In one embodiment, the adhesive  102  is applied only to the rear portion  109 , the longitudinal portion  105 , the lateral portions  106 ,  107 , and a portion of the front portion  108  of the shoe insert liner  100  that corresponds to the tongue portion  130  of the shoe  104 , as illustrated in  FIGS. 2A and 2B . Providing no adhesive along the portion of the shoe insert liner  100  that corresponds to the toe portion  133  of the shoe  104  tends to conform this portion of the shoe insert liner  100  to the user&#39;s foot, as illustrated in  FIG. 3B , which tends to aid in wicking moisture from the user&#39;s foot. The amount and location of adhesive  102  applied may depend upon the desired strength of the bond between the shoe insert liner  100  and the shoe  104 . In one embodiment, the fabric sheet is approximately 12 inches wide, although the fabric sheet may be narrower or wider depending upon the size of the shoe  104  for which the shoe insert liner  100  is intended to be used. The method  300  of manufacturing the shoe insert liner  100  also comprises a task  320  of curing the adhesive layer  102  formed on one side of the fabric layer  101 . In one embodiment, a curing machine is configured to supply a heat source which cures the adhesive layer  102  to the fabric layer  101 . In one embodiment, the method  300  of manufacturing the shoe insert liner  100  also includes a task  330  of applying a protective covering, such as a thin film, to cover the adhesive layer  102 . The protective covering is configured to prevent contamination of the adhesive layer  102  during the remaining manufacturing processes and during packaging and shipping. Moreover, the protective covering is configured to be removed from the adhesive layer  102  prior to insertion of the shoe insert liner  100  into the interior cavity  103  of the shoe  104 . 
     With continued reference to  FIG. 5 , the method  300  of manufacturing the shoe insert liner  100  may include a task  340  of cutting the fabric sheet  101  having an adhesive layer  102  into a flat pattern with a cutting mechanism. The cutting mechanism may be any machine suitable for cutting fabric, such as a die cutting machine or a laser cutting machine. In one embodiment, the fabric sheet  101  having the adhesive layer  102  is cut into the flat pattern  122  illustrated in  FIG. 6 . The flat pattern  122  has portions corresponding to the front portion  108 , the opposing lateral portions  106 ,  107 , the longitudinal portion  105 , and the rear portion  109  of the finished shoe insert liner  100 . As illustrated in  FIG. 6 , the periphery of the flat pattern  122  includes seam portions A, B, C, D, E, F, and G. In one embodiment, the method  300  comprises a task  350  of connecting seam portions with like reference characters, such as by stitching or bonding, to form the shoe insert liner  100 . Specifically, opposing edges C of the flat pattern  122  are configured to be connected together to form the lateral portions  106 ,  107  of the shoe insert liner  100 . Edges A and B, respectively, are configured to be connected together to form the rear portion  109  of the shoe insert liner  100 . Edges D, E, F, and G, respectively, are configured to be connected together to form the front portion  108  of the shoe insert liner  100 . It will be appreciated by a person of ordinary skill in the art that the edges of the flat pattern  122  must be folded in the same direction to produce the cavity  110  of the shoe insert liner  100  configured to receive the user&#39;s foot. Moreover, the edges of the flat pattern  122  must be folded such that the adhesive layer  102  is disposed on the exterior surface of the shoe insert liner  100 . That is, the edges of the flat pattern  122  must be folded away from the adhesive layer  102 . Although the flat pattern  122  is illustrated as a single piece in  FIG. 6 , in an alternate embodiment the flat pattern  122  may comprise two or more separate pieces which may be connected together to form the shoe insert liner  100 . 
     While this invention has been described in detail with particular references to exemplary embodiments thereof, the exemplary embodiments described herein are not intended to be exhaustive or to limit the scope of the invention to the exact forms disclosed. Persons skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described structures and methods of assembly and operation can be practiced without meaningfully departing from the principles, spirit, and scope of this invention, as set forth in the following claims. Although relative terms such as “outer,” “inner,” “upper,” “lower,” “below,” “above,” “vertical,” “horizontal” and similar terms have been used herein to describe a spatial relationship of one element to another, it is understood that these terms are intended to encompass different orientations of the various elements and components of the device in addition to the orientation depicted in the figures. While in one embodiment, the method of manufacturing a shoe insert liner may include each of the tasks described above and shown in  FIGS. 4 and 5 , respectively, in other embodiments one or more of the tasks may be absent and/or additional tasks may be performed. Moreover, the figures contained in this application are not necessarily drawn to scale.