Patent Description:
One solution is to don a bouffant cap only instead of a bouffant cap and surgeon's cap. However, bouffant caps generally cannot support the use of headlamps or other equipment that may be used by a health care professional. Hence, it is necessary to don both a bouffant cap and a surgeon's cap, as the surgeon's cap has sufficient bulk and structure to support headlamps and other equipment. Nevertheless, problems also exist with the use of a surgeon's cap. Namely, typical surgeon's caps only come in a few sizes and do not provide a secure enough fit for many health care professionals. In addition, although surgeon's caps may be outfitted with ties, the repetition of tying a surgeon's cap to secure its fit over an extended time period can lead to shoulder pain and other issues.

Further, many head covers used during procedures are constructed of non-wettable materials. Particularly, materials such as spunbond or meltspun polyolefin materials lack breathability and wettability, and may result in sweating in various areas of the head due to stress, temperature, and/or personal predisposition to perspiration. Thus, such head covers may cause unsanitary and uncomfortable situations as the material allows sweat to drip into the eyes and onto sterile surfaces.

<CIT> and <CIT> both disclose a head cover comprising an anterior portion having a first height; a posterior portion having a second height; a side portion extending between the posterior portion and the anterior portion and having a bottom edge; and wherein the bottom edge of the at least one side portion has a nonlinear contour.

Consequently, there is a need for a head cover that overcomes the aforementioned shortcomings of existing surgeon's caps and bouffant caps. In particular, a head cover that covers a health care professional's hair without the need to wear a surgeon's cap and a full bouffant cap would also be useful. Additionally, it would be beneficial to provide a head cover that fits a large portion of potential users without the need for adjustment. Furthermore, it may be beneficial to provide a head cover that has improved breathability and/or wettability.

The present disclosure is directed to a head cover. The head cover includes an anterior portion having a first height, a posterior portion having a second height, and at least one side portion. The at least one side portion extends between the posterior portion and the anterior portion and has a bottom edge, where the bottom edge of the at least one side portion has a nonlinear contour.

The bottom edge has a first slope and a second slope, where the first slope is not equal to the second slope. The top surface is formed from a spunbond material, and the at least one side portion is formed from a spunbond-meltblown-spunbond material.

Furthermore, in an embodiment, the first slope is a slope of a point between the anterior portion and the posterior portion, and the second slope is a slope of a point adjacent to one of the anterior portion or the poster portion, and where the absolute value of the first slope is greater than the absolute value of the second slope. Moreover, in an embodiment, the bottom edge includes a third slope that is not equal to the first slope or the second slope.

Optionally, the head cover includes at least one elastic strip. In a further embodiment, the second height is about <NUM> to about <NUM> times the first height. Moreover, in an embodiment, the head cover has a relaxed length when folded along a medial line of from about <NUM> to about <NUM>. In a further embodiment, the head cover, the at least one elastic strip, or both the head cover and the at least one elastic strip, are capable of being stretched such that the head cover has a stretched length along the medial line of from about <NUM> to about <NUM> times the relaxed length.

These and other features, aspects, and advantages of the present disclosure will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure.

Generally speaking, the present disclosure is directed to a head cover that can be worn by health care professionals. Particularly, a head cover according to the present disclosure may have a height h at an anterior portion of the head cover sufficient to cover an anterior portion of a user's head, such as a forehead of a user, and a height h<NUM> at a posterior portion of the head cover sufficient to cover a posterior portion of a user's head, such as the nape of a neck of a user, and at least one side portion or panel which may be shaped and sized so as to connect the anterior portion of the head cover and the posterior portion of the head cover. The at least one side portion has a contoured section t that forms all or a portion of a bottom edge of the side portion. The bottom edge of the side portion extends from a bottom edge of an anterior portion to a bottom edge of a posterior portion, and is shaped and sized so as to cover the ears, scalp, and sideburns of a user as required by AORN guidelines while also remaining clear of a user's eyes and field of vision adjacent to the anterior portion of a head cover.

Additionally, a head cover according to the present disclosure may have elastic along all or a portion of the head cover sufficient to produce a secure fit for most users, but that is not a full band around an entirety of the head cover. Further, a head cover according to the present disclosure, when donned by a user, may be configured to have adequate head coverage for at least about <NUM>%, such as at least about <NUM>% of users, such as by having a height h, a height h<NUM>, a contour t, and/or an elastic band, according to the present disclosure that allows the head cover to fit a large percentage of users or potential users. Similarly, a head cover according to the present disclosure may be configured to have an adequate or acceptable fit for at least about <NUM>%, such as at least about <NUM>% of users or potential users, for instance by having a height h, a height h<NUM>, and/or a contour t, according to the present disclosure, and/or other factors that are to be discussed herein, where an adequate or acceptable fit is determined based on a "one size fits most" (e.g., a fit that based upon the disclosed heights and circumferences, including stretched and relaxed circumferences, that would fit about <NUM>% or greater of the population in a manner that would result in the head cover being capable of being placed properly around the head, for example a circumference large enough in a stretched state to encircle <NUM>% or greater of head circumferences, as well as maintaining proper placement on the head after donning, for example a relaxed circumference capable of maintaining sufficient contact or pressure to remain where placed, as well as anterior and posterior heights that cover a sufficient portion of the users head to meet relevant standards, but that do not impact mobility and/or vision/line of sight). The specific features of the head cover of the present disclosure may be better understood with reference to <FIG>.

Referring now to <FIG>, one embodiment of a head cover <NUM> contemplated by the present disclosure is shown before the head cover <NUM> has been donned and secured about the head of a wearer. The head cover <NUM> according to the present disclosure has an anterior portion <NUM> that is positioned about a forehead of a wearer and a posterior portion <NUM> that can be secured about the back of the head or neck of the wearer. The head cover <NUM> also includes a top surface <NUM> and a side portion <NUM>. In one embodiment, the top surface <NUM> and the side portion <NUM> can be joined together at a seam <NUM> that encircles the circumference (shown more clearly in <FIG>) of the top surface <NUM>. The side portion <NUM> extends between the anterior portion <NUM> and the posterior portion <NUM>. The side portion <NUM> is formed from a spunbond-meltblown-spunbond material. Of course, it should be noted, as shown in <FIG>, and as will be discussed in greater detail below that the side portion <NUM> may be formed of a continuous piece of material, such as a side panel <NUM> that completely encircles a head of a user when donned, and that may include side portion or portions <NUM>, anterior portion <NUM>, and posterior portion <NUM>.

Additionally, in an embodiment of the present disclosure, the head cover <NUM> may have a height h at an anterior portion <NUM> of the head cover <NUM> that is less than a height h<NUM> at a posterior portion <NUM> of the head cover <NUM>. For instance, in one embodiment, a height h may be a height sufficient to cover a forehead of a user without obscuring the eyes or eyebrows of a user, or infringing upon the user's vision or line of sight. In such an embodiment, the height h at an anterior portion <NUM> of the head cover <NUM> may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>.

Furthermore, in an embodiment according to the present disclosure, the height h<NUM> at a posterior portion <NUM> of the head cover <NUM> may have a height that is greater than a height h at an anterior portion <NUM> of the head cover <NUM>. For instance, in one embodiment, the height h<NUM> at a posterior portion <NUM> of the head cover <NUM>, may be sufficient to cover the back of a user's neck, such as to at least partially, if not fully, cover the nape of the user's neck. In such an embodiment, the height h<NUM> at a posterior portion <NUM> of the head cover <NUM> may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>. It should be noted, that in one embodiment, the posterior portion <NUM> of the head cover <NUM> can fully cover the nape of a user's neck to provide sufficient neck coverage as required by AORN standards.

In one embodiment, a height h<NUM> at a posterior portion <NUM> of the head cover <NUM> may have a height of from about <NUM> to about <NUM> times the height h at an anterior portion <NUM>, such as from about <NUM> to about <NUM> times the height h at an anterior portion <NUM>, such as from about <NUM> to about <NUM> times the height h at an anterior portion <NUM>, such as from about <NUM> to about <NUM> times the height h at an anterior portion <NUM>. Thus, the opposite is also true. Particularly, if instead, a height h<NUM> at a posterior portion <NUM> is known, the height h<NUM> may be divided by the above multipliers to arrive at a height h of an anterior portion <NUM> of the head cover <NUM>.

Continuing to discuss <FIG>, a head cover <NUM> according to the present disclosure has a side portion <NUM> that may be a portion of a continuous side panel <NUM>, that extends from an anterior portion <NUM> of the head cover <NUM> to a posterior portion <NUM> of the head cover <NUM>. The bottom edge <NUM> of the side portion <NUM> has at least a first slope and a second slope, and where the first slope is not equal to the second slope. The side portion <NUM> may have a contoured portion t defining the bottom edge <NUM> of the side portion <NUM>. However, it should be noted that, in an embodiment where the side portion <NUM> is a portion of a continuous side panel <NUM> that completely encircles a head of user, the contoured portion t may define a bottom edge <NUM> of only the side portion <NUM>, such as a portion extending between an anterior portion bottom edge <NUM> and a posterior portion bottom edge <NUM> of the side portion <NUM>, such that anterior portion <NUM> and posterior portion <NUM> may each have their own respective bottom edges (<NUM> and <NUM>) that are not defined by contour portion t. In such an embodiment, it may be noted that the anterior portion bottom edge <NUM>, and the posterior portion bottom edge <NUM> may be delineated and/or marked, such as by a seam or other marker (as shown more clearly in <FIG>, <FIG>) indicating the transition from a side portion <NUM> to an anterior <NUM> or posterior portion <NUM>, or may simply be a point on the side panel <NUM> with no delineation (as shown more clearly in non-claimed <FIG> and <FIG>), such as a point where the height (h or h<NUM>) is no longer increasing or decreasing along the contoured portion t, and/or where the bottom edge <NUM> has no or negligible slope (as may be shown and described more clearly in regards to non-claimed <FIG>, and <FIG>). Particularly, while the anterior portion bottom edge <NUM> and/or posterior portion bottom edge <NUM> may have some slope between their respective first and second ends, (<NUM>,<NUM>; <NUM>,<NUM> respectively), in one embodiment, the anterior portion bottom edge <NUM> and posterior portion bottom edge <NUM> are substantially horizontal or have no or negligible slope.

Additionally, in one embodiment, the anterior portion bottom edge <NUM> extends between a first end <NUM> of the anterior portion bottom edge <NUM> and a second end <NUM> of the anterior portion bottom edge <NUM>, and the posterior portion bottom edge <NUM> extends between a first end <NUM> of the posterior portion bottom edge <NUM> and a second end <NUM> of the posterior portion bottom edge <NUM>. Thus, in one embodiment, the bottom edge <NUM> of the side portion <NUM> may extend between a first end <NUM> of the anterior portion bottom edge <NUM> and the first end <NUM> of the posterior portion bottom edge <NUM>, and/or the bottom edge <NUM> of the side portion <NUM> may extend between the second end <NUM> of the anterior portion bottom edge <NUM> and the second end <NUM> of the posterior portion bottom edge <NUM>.

Regardless, the contoured portion t may define a bottom edge <NUM> of the side portion <NUM> that increases the height of the side portion <NUM> of the head cover <NUM> when moving from an anterior portion <NUM> to a posterior portion <NUM>, and decreases a height of the side portion <NUM> when moving from a posterior portion <NUM> to an anterior portion <NUM>. Particularly, the bottom edge <NUM> of the side portion <NUM> connects an anterior portion bottom edge <NUM> and a posterior portion bottom edge <NUM>, using a bottom edge <NUM> of the side portion <NUM> that is not horizontal and/or that has at least some positive slope when moving along the bottom edge <NUM> from a posterior portion <NUM> to an anterior portion <NUM> or at least some negative slope when moving along the bottom edge <NUM> from an anterior portion <NUM> to a posterior portion <NUM>, in order to connect the of the anterior portion bottom edge <NUM>, which has a smaller height h, to a posterior portion bottom edge <NUM> which has a larger height h<NUM>, in a smooth, continuous, but not necessarily linear, manner. For instance, the bottom edge <NUM> of the side portion may connect the anterior portion <NUM> and posterior portion <NUM>, in one embodiment, by extending between a first end <NUM> of the anterior portion bottom edge <NUM> and a first portion <NUM> of the posterior portion bottom edge <NUM>, and/or the bottom edge <NUM>.

In one non-claimed disclosure, the bottom edge <NUM> may display a change in height in a linear or nonlinear manner. For instance, in the non-claimed disclosures of <FIG>, the change in height of the head cover <NUM> along bottom edge <NUM> may be roughly linear, in contrast to the claimed invention. However, according to the invention, such as an embodiment shown in <FIG>, the bottom edge <NUM> exhibits a change in height in a nonlinear manner and have at least one change in average slope, such as at least two changes in average slope, such as at least three changes in average slope, where the average slope of the nonlinear bottom edge <NUM> may be measured between a starting point and an inflection point, and an inflection point and an end point, or simply at a starting and ending point and one or more predetermined points therebetween.

For instance, as generally shown in <FIG>, the contoured portion t defines a bottom edge <NUM> that, beginning at a first end <NUM> and/or a second end <NUM> of the anterior portion bottom edge <NUM> and moving along the bottom edge <NUM> towards a first end <NUM> and/or second end <NUM> of the posterior portion bottom edge <NUM>, has a negative slope that initially increases the height of the side portion <NUM> of the head cover <NUM> at a very gradual rate. When a point along the bottom edge <NUM> is reached, such as the point labeled m in <FIG>, though it is noted that, point m may have no physical delineation and may simply refer to a point along bottom edge <NUM> such as a point of change in slope, signifying a change in the rate of increase in height of the side portion <NUM> of the head cover <NUM>, the slope may become more negative, signifying a greater rate of increase in height of the side portion <NUM> along that portion of bottom edge <NUM>. Similarly, continuing towards a first end <NUM> and/or second end <NUM> of the posterior portion bottom edge <NUM> from point m, the bottom edge <NUM> may reach a point, such as point <NUM>, where the slope becomes less negative, and begins tapering towards a horizontal line, such as the slope of posterior portion bottom edge <NUM>, signifying a lessening of the rate of increase in the height of the side portion <NUM> of the head cover <NUM>. Therefore, in such an embodiment moving from an anterior portion towards a posterior portion, while the slope between points m and <NUM> may be the most negative, it is actually the largest slope in terms of the rate of change of the height. Therefore, when referring to a greatest or largest slope, reference may be made to the absolute value of the slope, such that the most negative slope may be the largest or greatest slope, in some embodiments. In non-claimed embodiments shown in <FIG>, and as discussed above, the bottom edge <NUM> may also display a generally linear change in height between the anterior portion <NUM> and posterior portion <NUM>, in contrast to the claimed invention.

Notwithstanding the contoured portion t, the head cover <NUM> may also include an elastic strip or elastic portion <NUM> along all or a portion of the head cover <NUM>. For instance, referring again to <FIG>, in one embodiment, the head cover <NUM> may include an elastic strip <NUM> only along a posterior portion <NUM>. Particularly, <FIG> shows the elastic strip <NUM> beginning at point <NUM> and extending to at least the first end <NUM> of the posterior portion bottom edge <NUM>. The elastic strip <NUM> may be integrated into the fabric, where a posterior portion <NUM> can be formed from a material having some elasticity, or the elastic strip <NUM> may be integrated into the head cover <NUM> by attaching the elastic strip <NUM> to the material that forms the portion of the head cover <NUM> where attachment of the elastic strip <NUM> is desired either before or after formation of the head cover <NUM>. In such an embodiment where a separate elastic strip <NUM> is integrated into the head cover and is not a property of the material itself, such as by attaching the elastic strip <NUM> to the material that forms the head cover <NUM>, the elastic strip <NUM> may be attached to the head cover <NUM> such that the elastic strip <NUM> is on an exterior surface of the head cover <NUM> or such that it is on an interior surface of the head cover <NUM> (e.g. between the head cover and a user when donned). However, in one embodiment, as will be discussed in greater detail below, elastic strip <NUM> may be located along the posterior portion bottom edge <NUM>, and in a further embodiment, may be located on an interior portion of the posterior portion bottom edge <NUM>. In such embodiments, the fit of the head cover <NUM> may be improved as previously discussed, such as by providing a soft elastic strip that is only attached to a portion of a head cover, minimizing pinching and marking from an elastic band (e.g., that encircles a user's head), but yet providing a comfortable and secure fit to a larger number of users.

Thus, in one embodiment, the elastic strip <NUM> may be attached at point <NUM> which may have a height h<NUM>. The height h<NUM> may be a height slightly less than a height h<NUM> of the posterior portion <NUM> but slightly greater than a height h of an anterior portion <NUM> of the head cover <NUM>. For instance, in one embodiment, the height h<NUM>, of the side portion <NUM> of the head cover <NUM> where the elastic strip <NUM> may be attached to the bottom edge <NUM> of the side portion <NUM> may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>.

Additionally, in a relaxed state, the elastic strip <NUM> may have a length l, prior to incorporation into the head cover <NUM>, of from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>. Of course, referring to <FIG>, in one embodiment, the above ranges may relate to an elastic strip <NUM> that extends from a first end <NUM> of the posterior portion bottom edge <NUM> to posterior seam <NUM>. Particularly, in such an embodiment, the elastic strip <NUM>, may include two portions, one portion extending from the first end <NUM> of the posterior portion bottom edge <NUM> towards the posterior seam <NUM>, and a second portion extending from the second end <NUM> of the posterior portion bottom edge <NUM> towards the posterior seam <NUM>. Alternatively, the elastic strip <NUM> may be an elastic strip <NUM> that extends along the entire posterior section <NUM> from the first end <NUM> of the posterior portion bottom edge <NUM> to the second end <NUM> of the posterior portion bottom edge <NUM>, or from one point marked by reference character <NUM> to a corresponding point <NUM> on an opposing side of the head cover <NUM>. In such an instance, the elastic strip <NUM> (whether in two halves or one whole), prior to incorporation into the head cover <NUM>, or prior to stretching/in a relaxed state, may have a length l<NUM> of from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>.

Nonetheless, whether the elastic strip <NUM> includes only a single portion having the originally disclosed relaxed length l, two portions each having a length l, or a single portion having a length l<NUM>, the elastic strip <NUM>, when stretched, may have a stretched length (not shown) of from about <NUM> to <NUM> times its relaxed length, such as from about <NUM> to <NUM> times the length (l or l<NUM>) of the elastic strip <NUM> in the relaxed state (as more clearly shown in <FIG>). In such an embodiment, the length l of the elastic strip <NUM>, when stretched prior to incorporation into the head cover <NUM>, and/or in a relaxed state prior to stretching, may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>.

Of course, while the above lengths may be provided for the elastic strip <NUM>, the amount of stretching of the head cover <NUM> may also be dependent or limited by the stretch of the material forming the head cover <NUM> or any pleats or gussets <NUM> provided therein. In one embodiment, such as may be shown more clearly in <FIG>, <FIG>, the head cover <NUM> may have one or more gussets and/or pleats <NUM>. Thus, in an embodiment such as shown in <FIG> when a head cover <NUM> is folded or separated in half along its medial line, such as a line extending through a center of a posterior portion <NUM> and a center of an anterior portion <NUM>, the head cover <NUM> may have a length l<NUM> of from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>. In such an embodiment, when stretched along line A, (see <FIG>), the head cover <NUM> may have a length (not shown) of from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, or alternatively, may be stretched to a length of from about <NUM> to about <NUM> times the length of the unstretched or relaxed length, in this case l<NUM>.

Next, <FIG> shows an embodiment of the present disclosure from a front view. The head cover <NUM> has a top surface <NUM> and side portion <NUM> (or portions <NUM> as previously discussed. The top surface <NUM> and side portion <NUM> can be joined together at a seam <NUM> that encircles the circumference (shown more clearly in <FIG>) of the top surface <NUM>. The head cover <NUM> has an anterior portion bottom edge <NUM>, a first end <NUM> and a second end <NUM> of the anterior portion bottom edge <NUM>, a posterior portion bottom edge <NUM>, and a first end <NUM> and second end <NUM> of the posterior bottom edge <NUM>. As previously discussed, in one embodiment, the side portion <NUM> is a portion of a continuous side panel <NUM>. As such, there is no mark or delineation between the side portion <NUM> and the anterior portion <NUM> and/or posterior portion <NUM>. Instead, a first end <NUM> and/or second end <NUM> of the anterior portion bottom edge <NUM>, may mark the point where the contoured portion t and the anterior portion <NUM> meet, and/or may be located at an anterior portion <NUM> of the head cover <NUM> where the anterior portion bottom edge <NUM> is substantially horizontal or has no or negligible slope. Similarly, a first end <NUM> and/or second end <NUM> of the posterior portion bottom edge <NUM> may mark the point where the contoured portion t and the posterior portion <NUM> meet, and alternatively may be located at a posterior portion <NUM> of the head cover <NUM> where the posterior portion bottom edge <NUM> is substantially horizontal or has no or negligible slope.

<FIG> shows an embodiment of the present disclosure from a rear view. The head cover <NUM> has a top surface <NUM> and side portion <NUM> (or portions <NUM> as previously discussed. The top surface <NUM> and side portion <NUM> can be joined together at a seam <NUM> that encircles the circumference (shown more clearly in <FIG>) of the top surface <NUM>. While the head cover <NUM> has an anterior portion bottom edge <NUM> and a posterior portion bottom edge <NUM>, only the posterior portion bottom edge <NUM>, include the first end <NUM> and second end <NUM> of the posterior portion bottom edge <NUM>, is visible from the rear view. A portion of the contoured portion t is visible, extending to the left of the first end <NUM> of the posterior portion bottom edge <NUM> and to the right of the second end <NUM> of the posterior portion bottom edge <NUM>. As discussed above, the side portion <NUM> may be a portion of a continuous side panel <NUM>. As such, there is no mark or delineation between the side portion <NUM> and the posterior portion <NUM>. Instead, the first end <NUM> and/or the second end <NUM> of the posterior portion bottom edge <NUM>, may mark the point where the contoured portion t and the posterior portion <NUM> meet, and alternatively may be located at a posterior portion <NUM> of the head cover <NUM> where the posterior portion bottom edge <NUM> is substantially horizontal or has no or negligible slope.

<FIG> shows an embodiment of the present disclosure from a top view. The head cover <NUM> has a top surface <NUM> and side portion <NUM> (or portions <NUM> as previously discussed. The top surface <NUM> and side portion <NUM> can be joined together at a seam <NUM> that encircles the circumference (shown more clearly in <FIG>) of the top surface <NUM>. As shown in the top view of <FIG>, in one embodiment, the head cover <NUM> can have a circumference C measured around an exterior portion of the head cover, such as the circumference of side panel <NUM>. Further, in this embodiment, the circumference C around the portion of side panel <NUM> adjacent to the top surface <NUM> or seam <NUM> may be the same or similar to a circumference of the side panel <NUM> adjacent to a bottom edge <NUM> (not shown in this Fig). However, as may be understood by one in the art and as generally shown in <FIG>, the present disclosure also contemplates an embodiment wherein a portion adjacent to the top surface <NUM> may have a smaller circumference than a portion adjacent to a bottom edge <NUM>.

For instance, in one embodiment, the circumference C of the head cover <NUM> may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>. Alternatively, in an embodiment where the circumference may be different at a bottom edge <NUM> than adjacent a top surface <NUM>, the larger of the two circumferences C may be based upon the above recited circumferences, and the smaller circumference may be from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>, such as from about <NUM> to about <NUM>.

Next, <FIG> is a bottom perspective view of an embodiment according to the present disclosure. As shown in <FIG>, a head cover <NUM> of the present disclosure may have an anterior portion <NUM>, a posterior portion <NUM>, a top <NUM>, a posterior seam <NUM>, a bottom edge <NUM>, and a bottom seam <NUM> that joins the bottom edge <NUM> to the side panel <NUM> (or side portions <NUM>). In such an embodiment, the head cover <NUM> also has gussets or pleats <NUM>. While a head cover <NUM> may be formed from a material naturally having stretch or give, in one embodiment, as discussed above, gussets or pleats <NUM> may be used to provide folded and contained excess material that allow the head cover <NUM> to stretch a predetermined amount in order to fit a large variety of users having different head shapes and sizes. The gussets or pleats <NUM> may also serve as a mark or delineation at one or both of the first end <NUM> and second end <NUM> of the anterior portion bottom edge <NUM>, in this embodiment, between the side portion <NUM> and the anterior portion <NUM>, or at one or both of the first end <NUM> and the second end <NUM> of the posterior portion bottom edge <NUM>, between the side portion <NUM> and the posterior portion <NUM>. Of course, in a further embodiment, no gussets or pleats are needed and instead, the material may be scrunched in all or a portion of the head cover <NUM>, such as around the elastic strip <NUM>, or the material may have sufficient natural stretch to enable to head cover <NUM> to stretch to a fully extended stretched position as discussed above.

<FIG> is a side perspective view of an embodiment according to the present disclosure. As shown in <FIG>, a head cover <NUM> of the present disclosure may have an anterior portion <NUM>, a top <NUM>, a seam (or seams) <NUM>, a bottom edge <NUM>, and a bottom seam <NUM> that joins the bottom edge <NUM> to the side panel <NUM> (or side portion(s) <NUM>). For instance, in one embodiment, one or more seams <NUM> may be used to join the top <NUM> to the side panel <NUM>, for instance, to form a tapered seam or line from the side panel <NUM> to the top <NUM> or to better secure the top <NUM> to the side panel <NUM>. In such an embodiment, the head cover <NUM> also has gussets or pleats <NUM>. As discussed above, while a head cover <NUM> may be formed from a material naturally having stretch or give, in one embodiment, gussets or pleats <NUM> may be used to provide neatly folded and contained excess material that allows the head cover <NUM> to stretch in order to fit a large variety of users having different head shapes and sizes. The gussets or pleats <NUM> may also serve as a mark or delineation in this embodiment at the first end <NUM> of the anterior portion bottom edge <NUM>, which may mark the point at which the side portion <NUM> meets the anterior portion <NUM>, in this embodiment.

<FIG> shows a view of a non-claimed head cover <NUM> according to the present disclosure that has been separated along the posterior seam <NUM>. For instance, <FIG> may have a length l<NUM>, which may have the same length in centimeters as either circumference C discussed above. Furthermore, <FIG> shows a single panel <NUM> forming the sides of the head cover <NUM> that has been, or will be, stitched together at posterior seam <NUM> or by using some other method of fastening at posterior seam <NUM>, to form the head cover <NUM> that may encircle a head of a user. <FIG> further shows an embodiment wherein the contoured portion t has a generally linear contour, in contrast to the claimed invention. As discussed above, the contoured portion t of the invention is nonlinear. Such a contour should be selected to be compatible with the above disclosed heights and also selected to have a contour portion t that connects the anterior portion bottom edge <NUM> and posterior portion bottom edge <NUM> of the head cover <NUM> while leaving the eyes of a user and a vision of a user, unencumbered and covering the ears, scalp, hair, and nape of a neck, of a user.

For instance, in one embodiment, the contoured portion t may begin around the first end <NUM> and/or second end <NUM> of the anterior portion bottom edge <NUM> and may have a fairly shallow negative slope so as to slowly increase the height of the head cover <NUM> from the anterior portion <NUM> to the posterior portion <NUM>. In such a manner, the height of the contoured portion t near the anterior portion <NUM> and adjacent to a face and/or eyes of a user when in a donned configuration, may be near the same height as the anterior portion <NUM>, or slightly greater. However, as the transition continues along bottom edge <NUM>, the contoured portion may have a steeper negative slope, quickly increasing the height of the head cover <NUM> so as to cover the ears and desirably, earrings if necessary, of a user. The contoured portion t may then begin to taper back to a more gentle slope, approaching a slope of zero when nearing the first end <NUM> and/or second end <NUM> of the posterior portion bottom edge <NUM>. In such a manner, the contoured portion t may define a bottom edge <NUM> having a change in a height of a side portion <NUM> of a head cover <NUM> in order to cover the ears, hair, scalp, and nape of a neck of a user, without covering the eyes or eyebrows of a user and/or inhibiting the vision or line of sight of a user.

Similarly, and as discussed above, elastic strip <NUM> may also be used to improve the fit of a non-claimed head cover <NUM> of the present disclosure as shown in <FIG>. Particularly, <FIG> shows an embodiment of <FIG> that further includes one or more elastic strips <NUM>. The elastic strips <NUM> may be any material having elastic properties, such as elastics that may be generally used or known in the art, and may be used as a portion of the head cover <NUM> or may be an elastic strip <NUM> attached to or integrated with the head cover <NUM>. Particularly, as discussed above, the elastic strip <NUM> may end, or be attached to the head cover <NUM>, at a point <NUM>. Such a point may be at a location along the contoured portion t on the bottom edge <NUM> of the side portion <NUM> where a height of the side portion <NUM> may be from about <NUM> to about <NUM> less than the height h<NUM> of the posterior portion <NUM>, or, where side portion <NUM> may have a height equal to any of the heights discussed in regards to height h<NUM> above.

In one embodiment, point <NUM> may be located along the bottom edge <NUM> of the side portion <NUM>, measured from the posterior seam <NUM> towards an anterior portion, at a distance of from about <NUM> to about <NUM> when in a relaxed state, from the posterior seam <NUM>, such as from about <NUM> to about <NUM> from the posterior seam <NUM>, such as from about <NUM> to about <NUM>, from the posterior seam <NUM> towards the anterior portion <NUM>.

In such a manner, when at least one of the contoured portion t of the side portions <NUM> and the size and position of the elastic strip <NUM>, or a combination thereof are selected according to the present disclosure, a head covering <NUM> that fits a large percentage of users and also meets AORN guidelines for coverage may be provided. Particularly, when a contoured portion t, first height h, second height h<NUM>, elastic strip <NUM>, or a combination thereof, are selected according to the present disclosure, a head cover <NUM> according to the present disclosure when donned by a user, may have an adequate or acceptable fit for at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>% of users who don the head cover <NUM>, where an adequate or acceptable fit may be defined as discussed above.

Additionally or alternatively, a head cover <NUM> according to the present disclosure, when donned by a user, may have adequate head and/or neck coverage for at least about <NUM>%, such as for at least about <NUM>%, such as for at least about <NUM>%, such as for at least about <NUM>%, such as for at least about <NUM>%, such as for at least about <NUM>% of users who don the head cover <NUM>. Particularly, a head cover <NUM> according to the present disclosure was found to comply with AORN coverage guidelines on at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>%, such as at least about <NUM>% of users who don the head cover.

Regardless of the particular configuration of the head cover <NUM> selected, the materials used to form the head cover <NUM> can be chosen to maximize the comfort to the wearer. For instance, the top surface <NUM> and the side portion(s) <NUM> or side panel <NUM> can be made from a variety of nonwoven materials formed by any number of processes including, but not limited to, air laying processes, wet laid processes, hydroentangling processes, spunbonding, meltblowing, staple fiber carding and bonding, and solution spinning. The fibers in the nonwoven materials themselves can be made from a variety of both natural and synthetic materials including, but not limited to, cellulose, rayon, nylon, polyesters, polyolefins, including polypropylene and random co-polymer resins, and many other materials. The fibers may be relatively short, staple length fibers, typically less than three inches, or longer and substantially more continuous fibers such as are produced by spunbonding and meltblowing processes.

According to the invention, the top surface <NUM> of the head cover <NUM> is formed from a spunbond material to facilitate air flow and minimize the amount of heat trapped within the head cover <NUM>. Meanwhile, the side portion(s) <NUM> or the side panel <NUM> are formed from a spunbond-meltblown-spunbond material made from three separate layers that are laminated to one another in order to provide sufficient structure to support a headlamp or any other accessories that might be worn about the crown of the head by a health care professional. The method of making the aforementioned materials is known and described in <CIT> The material of Brock, et al. is a three layer laminate of spunbond-meltblown-spunbond layers that is also commonly referred to by the acronym "SMS. " The two outer layers (e.g., the innermost and outermost layer) of SMS are a spunbond material made from extruded polyolefin fibers, or filaments, including polypropylene and random co-polymer resins, laid down in a random pattern and then bonded to one another. The inner layer (or the middle layer located between the two outer spunbond layers) is a meltblown layer also made from extruded polyolefin fibers generally of a smaller diameter than the fibers in the spunbond layers. As a result, the meltblown layer provides increased barrier properties due to its fine fiber structure, which permits the sterilizing agent to pass through the fabric while preventing passage of bacteria and other contaminants. Conversely, the two outer spunbond layers provide a greater portion of the strength factor in the overall laminate. The laminate may be prepared using an intermittent bond pattern that is preferably employed with the pattern being substantially regularly repeating over the surface of the laminate. The pattern is selected such that the bonds may occupy about <NUM>% to about <NUM>% of the surface area of the laminate. Desirably, the bonds may occupy about <NUM>% to about <NUM>% of the surface area of the laminate.

For example, <FIG> illustrates a SMS laminate <NUM> according to an embodiment of the present disclosure. The SMS laminate <NUM> includes a first spunbond layer <NUM>, a meltblown layer <NUM>, and a second spunbond layer <NUM>. In one embodiment, the first spunbond layer <NUM> and the second spunbond layer <NUM> may be formed from the same or similar polymer composition, such as one of the polymer compositions discussed above. In an additional or alternative embodiment, the first spunbond layer <NUM> and the second spunbond layer <NUM> may be formed from different polymer compositions, or may contain one or more additives in the composition that differ as between the first spunbond layer <NUM> and the second spunbond layer <NUM>. Additionally, while the first spunbond layer <NUM> is described as the "first layer", first spunbond layer <NUM> may serve as the inner or outer surface of the laminate. Similarly, the second layer <NUM>, while described as the second layer, may also serve as either the inner or outer surface of the laminate.

However, in one embodiment, at least a portion of the head cover <NUM> is formed from a wettable SMS material, such as a fabric formed from an SMS laminate <NUM> that has been treated with a surfactant that allows the SMS fabric to absorb fluid. Particularly, as briefly discussed above, SMS fabrics are generally hydrophobic and water repellent. This may cause uncomfortable and unsanitary conditions during procedures, as sweat may drip down the face or head of a clinician, potentially distracting the clinician and placing the surgical site or procedure site at a higher risk for infection. Therefore, it would be beneficial to utilize a SMS fabric for its desirable breathability and lightweight qualities, but where the SMS fabric is also capable of absorbing liquids. Thus, the present inventors have found that by treating a SMS fabric with a surfactant, a wettable SMS fabric may be formed that retains desirable qualities of the SMS fabric, including durability, but may also exhibit good liquid absorbency and drying properties. For instance, a surfactant selected according to the present disclosure may allow the SMS fabric to retain its durability, breathability, and comfort, and may also provide the fabric with wettability and absorption properties in addition to aiding in reducing the surface tension of liquids that contact the SMS fabric.

Particularly, in one embodiment, the surfactant may be a cationic or anionic surfactant. Regardless of the type of surfactant chosen, it may be desirable to select a surfactant that is compatible with antistatic treatments used for nonwoven fabrics. Particularly, notwithstanding the surfactant selected, the surfactant may be sprayed on one or both sides of the SMS fabric, such as by applying an amount of surfactant such that the SMS fabric is saturated. At such a time, the SMS fabric saturated with a surfactant is put through standard processing for a SMS fabric, including running the saturated fabric through rolls and dryers to remove the liquid, leaving the surfactant impregnated on or in the fabric. For instance, a SMS fabric impregnated with a surfactant according to the present disclosure may have surfactant on one or both sides of the fabric, and/or coating the fibers forming the fabric through all three layers, or a portion of fibers from each of the three layers, or only coating the fibers of one or more layers of a fabric formed from a SMS laminate <NUM> according to the present disclosure. Therefore, as the surfactant is to undergo processing along with the SMS fabric after incorporation, it would be desirable to select a surfactant that is compatible with processes for producing SMS fabrics, such as antistatic treatments.

The surfactant may include one or more anionic surfactants, cationic surfactants, or a combination thereof. Anionic surfactants may include mono and dialkyl sulfosuccinates, alkyl sulfates, sulfonates such as alkyl, aryl, benzene, alkyl ether, and olefin sulfonates, alkyl ether sulfates, alcohol and alcohol ether sulfates, phosphates such as alkyl phosphates and phosphate ethers, alkyl and alkyl ether carboxylates, fatty carboxylates, alkyl and ethoxylated alkyl phosphate esters, taurates, and a combination thereof. In one embodiment, a cationic surfactant, used alone or in combination, may be a dialkyl sulfosuccinate or salt thereof, such as a dialkyl sulfosuccinate sold under the trade name DOSS-70D.

Surfactants according to the present disclosure may also include cationic surfactants such as quaternary ammonium compounds, fatty alcohol ethoxylates, alkylene glycol surfactants, or a combination thereof.

Additionally, the surfactant(s) may be applied as part of a surfactant composition that includes a carrier or solvent. In one embodiment, the carrier or solvent may be water, or alternatively, may be another carrier or solvent as generally known in the art which is compatible with a SMS fabric according to the present disclosure. Additionally, while not necessary, in some embodiments, the surfactant composition may also include various additives as known in the art, such as an antifoaming additive, for example, to minimize foaming of the surfactant when added to the carrier or solvent.

Particularly, as may be generally known in the art, a surfactant is used to reduce the surface tension of a liquid, increasing the liquid's spreading and wetting properties. The present inventors have found that when a surfactant composition is applied to a SMS fabric in an amount sufficient to saturate the fabric, for example, and then dried, the fabric may display wetting and absorbency properties, even when the base fabric is hydrophobic or has hydrophobic properties prior to application of the surfactant. For instance, surfactants are polar molecules that have a hydrophilic end and a hydrophobic end. When introduced to a SMS fabric according to the present disclosure, the hydrophobic ends may orient themselves on the fibers of the SMS fabric, coating all or a portion of the fibers of the SMS fabric, leaving the hydrophilic ends available to receive fluid coming into contact with the fabric. The hydrophilic ends may also reduce the surface tension of the fluid coming into contact with the fabric by overcoming the adhesion of the fluid to itself (e.g., surface tension), causing a spreading out of droplets and dispersion of the fluid over the surface of the fabric.

For instance, when an SMS fabric or laminate has been saturated with a surfactant, and then dried, the carrier or solvent may be evaporated while the surfactant is retained on the fabric or laminate, coating the fibers of the SMS fabric or laminate with the surfactant as discussed above. For example, referring to <FIG>, a SMS laminate <NUM>, which as discussed above may form all or a portion of a wettable SMS fabric according to the present disclosure, having a first spunbond layer <NUM>, a meltblown layer <NUM>, and a second spunbond layer <NUM>, further includes a surfactant <NUM>. The surfactant <NUM> has coated the SMS laminate <NUM> (such as coating the fibers thereof in one embodiment), and was applied in a manner sufficient to coat all three layers of SMS laminate <NUM>. In such an embodiment, the fibers from all or a portion of each of the layers may be coated with a surfactant, such that a continuous path of coated fibers (e.g., a coated fiber or section of fibers from one layer is adjacent to, or in contact with, a coated fiber or section of fibers in an adjacent layer) is formed between the first spunbond layer <NUM>, meltblown layer <NUM>, and second spunbond layer <NUM>, as may be shown in Fig. 1b, and may aid with wicking of a liquid through the entire laminate, for example. However, while <FIG> shows a SMS laminate <NUM> that has continuous paths of coated fibers throughout the entire laminate <NUM>, which as discussed above, may be a fiber or portion of fibers in adjacent layers that form a continuous path of coated fibers from the first spunbond layer <NUM> to the meltblown layer <NUM> to the second spunbond layer <NUM>, or vice-a-versa, in one embodiment, a wettable SMS fabric according to the present disclosure may only have portion of the fabric that has continuous coated fiber portions, and the other portion(s) may only be partially coated, or may be uncoated. As such, after drying, the surfactant may be present on or in the SMS fabric in an amount of from about <NUM> wt. % to about <NUM> wt. %, such as from about <NUM> wt. % to about <NUM> wt. %, such as from about <NUM> wt. % to about <NUM> wt. % based upon the weight of the wettable SMS fabric.

Regardless of the surfactant or combination of surfactants selected, and/or the materials used to form the wettable SMS fabric, the present inventors have unexpectedly found that the wettable SMS fabric, after treatment with the surfactant, displayed excellent absorbency properties. For instance, in one embodiment, the wettable SMS fabric according to the present disclosure may be capable of absorbing an amount of a liquid that is from about <NUM> times to about <NUM> times the weight of the weight of the SMS fabric, such as from about <NUM> times to about <NUM> times the weight of the SMS fabric, such as from about <NUM> times to about <NUM> times the weight of the SMS fabric based on the total weight of the SMS fabric. Additionally, a wettable SMS fabric according to the present disclosure may have a high absorbent capacity in grams per gram of the wettable SMS fabric. For instance, the wettable SMS fabric may absorb from about <NUM> grams to about <NUM> grams per gram of SMS fabric, such as from about <NUM> grams to about <NUM> grams per gram of SMS fabric, such as from about <NUM> grams to about <NUM> grams of a liquid per gram of SMS fabric. Additionally, the wettable SMS fabric may be capable of absorbing the amount of liquid up to its absorbent capacity in grams, at a rate of from about <NUM> second to about <NUM> seconds, such as from about <NUM> seconds to about <NUM> seconds, such as from about <NUM> seconds to about <NUM> seconds.

In such embodiments, the wettable SMS fabric may have a fabric weight in grams per square meter (gsm) of from about <NUM> gsm to about <NUM> gsm, such as from about <NUM> gsm to about <NUM> gsm, such as from about <NUM> gsm to about <NUM> gsm, such as from about <NUM> gsm to about <NUM> gsm, such as from about <NUM> gsm to about <NUM> gsm.

Additionally, the wettable SMS may display good wicking properties, such that absorbed liquid may be evaporated or dried off of the fabric, to move moisture away from the body. Particularly, the wettable SMS fabric of the present disclosure are sufficiently porous and wettable to exhibit capillary action, particularly a capillary action and/or drying rate higher than that of some cellulose based fabrics, showing that the wettable SMS fabric is able to wick moisture away from a surface and dry after absorbing a liquid. For instance, a wettable SMS fabric according to the present disclosure (tested using AATCC <NUM>, at <NUM>, using <NUM> of water) may have a drying rate of from about <NUM> milliliters per hour (mL/hr) to about <NUM>/hr, such as from about <NUM>/hr to about <NUM>/hr, such as from about <NUM>/hr to about <NUM>/hr.

Moreover, a wettable SMS fabric according to the present disclosure also displays excellent breathability, as indicated by having a high permeability to air passage. For instance, in one embodiment, the SMS fabric according to the present disclosure (tested according to ASTM D737-<NUM> using a <NUM> inch X <NUM> inch (<NUM> X <NUM>) sample) may have a permeability to air, measured in the cubic feet per minute (where <NUM> CFM = <NUM> litres per minute) of air that passes through the SMS fabric, of from about <NUM> CFM to about <NUM> CFM, such as from about <NUM> CFM to about <NUM> CFM, such as from about <NUM> CFM to about <NUM> CFM, such as from about <NUM> CFM to about <NUM> CFM, such as from about <NUM> CFM to about <NUM> CFM. Additionally, as the SMS fabrics of the present disclosure are constructed of polyolefin-based compositions, the wettable SMS fabrics of the present disclosure display low linting properties even after <NUM> year and <NUM> year accelerated aging, and particularly as compared to cellulose based fabric.

Furthermore, certain embodiments of the present disclosure may be better understood according to the following examples, which are intended to be non-limiting and exemplary in nature.

Particularly, wettable SMS fabrics according to the present disclosure were tested for their absorbent capacity (and percent absorption) and absorption rate, results of which are shown in Table <NUM>. Absorption rate was measured according to TAPPI T <NUM> using <NUM> inch X <NUM> inch (<NUM> X <NUM>) samples, and is an average of <NUM> samples tested. The absorbent capacity and percent absorption were tested using <NUM> samples of a SMS fabric with a basis weight of <NUM> gsm and a sample size of <NUM> inch X <NUM> inch (<NUM> X <NUM>). The wettable SMS fabric samples were produced from three different lots to account for lot variability.

Particularly, it was found that, on average, the SMS fabric had an absorbent capacity in grams of <NUM> grams, or an absorbent capacity (measured as percent absorption) of <NUM>% or roughly an absorption capacity for the liquid of about <NUM> times the weight of the fabric. Additionally, Table <NUM> shows an absorption rate in seconds of <NUM> seconds of an amount of liquid up to the samples absorbent capacity, showing that the wettable SMS fabric was able to quickly absorb the liquid.

In Table <NUM>, the drying rate of three wettable SMS samples according to the present disclosure (SMS <NUM>, SMS <NUM>, SMS <NUM>) were tested using the AATCC <NUM>, using <NUM> X <NUM> samples and <NUM> of water, at <NUM> and air flow over the sample of <NUM>/s, against a more traditional cellulose based fabric.

As shown in Table <NUM>, the wettable SMS samples had an average drying rate of <NUM>/hr as compared to an average of <NUM>/hr for the cellulose based samples. Therefore, the SMS samples dried almost twice as fast as the cellulose based samples in drying a liquid after it had been absorbed. Thus, a SMS fabric according to the present disclosure may be able to wick sweat away from the body of a user, more quickly than a cellulose based fabric. Additionally, Tables <NUM> and <NUM> show the ability of the SMS fabric to absorb a liquid from a surface, (e.g., which may be sweat from a user in one embodiment) and then also dry after absorption of the liquid.

Table <NUM> shows data resulting from the testing of a total <NUM> samples split between wettable SMS fabric samples according to the present disclosure and a spunbond fabric for breathability. For instance, the spunbond fabric may be a spunbond a fabric discussed above formed from a polyolefin, and which may be used in a personal protective equipment article in conjunction with the SMS fabric according to the present disclosure. Particularly, as will be discussed in greater detail below, spunbond fabrics may be used to form portions of an article where high breathability is needed, but high support is not, for instance on the top of a head cover where instrument support is not needed. Thus, a spunbond fabric may be used alongside an SMS fabric according to the present disclosure to form a breathable and light PPE garment. As will be discussed in greater detail, an article according to the present disclosure may be formed solely from the SMS fabric, or may have portions, such as the crown and sides formed from the SMS fabric and other portions, such as the top, formed from a spunbond fabric.

Thus, the samples were tested according to ASTM Test D737-<NUM> using <NUM> x <NUM> (<NUM> inch X <NUM> inch) samples for air permeability. In such a test, higher values indicate higher permeability to air passage. Particularly, the results are provided in the units cubic feet per minute (CFM, where <NUM> CFM = <NUM> litres per minute), and the results reflect a velocity at which air flows out or through a medium. Thus, a higher value in CFM indicates a material that is more permeable to air, as a greater velocity in CFM passes through the medium.

Thus, it can be concluded from Table <NUM>, that both fabrics used in a head cover <NUM> according to the present disclosure demonstrate air permeability and breathability.

Therefore, the present disclosure has found that a wettable SMS fabric may display properties that make it an ideal fabric for use in personal protection equipment.

Claim 1:
A head cover (<NUM>) comprising:
a top surface (<NUM>);
an anterior portion (<NUM>) having a first height (h);
a posterior portion (<NUM>) having a second height (h2);
at least one side portion (<NUM>) extending between the posterior portion (<NUM>) and the anterior portion (<NUM>) and having a bottom edge (<NUM>);
wherein the bottom edge (<NUM>) of the at least one side portion (<NUM>) has a nonlinear contour;
and the bottom edge (<NUM>) of the at least one side portion (<NUM>) has at least a first slope and a second slope, and where the first slope is not equal to the second slope, and characterized in that the top surface (<NUM>) is formed from a spunbond material, and the at least one side portion (<NUM>) is formed from a laminate spunbond-meltblown-spunbond material.