Abstract: A swim cap includes a shell forming a concave region terminating at a circumferential rim, and a resilient margin secured to the shell along the circumferential rim. The margin and circumferential rim form a visible boundary, while the shell and resilient margin each are formed from substantially waterproof material. The swim cap also can include at least one fastener configured to tighten the margin.

Abstract: A swim cap includes a shell forming a concave region terminating at a circumferential rim, and a resilient margin secured to the shell along the circumferential rim. The margin and circumferential rim form a visible boundary, while the shell and resilient margin each are formed from substantially waterproof material. The swim cap also can include at least one fastener configured to tighten the margin.

Abstract: This invention relates to a watertight cap with a sealing structure comprised of an adhesive strip, which adhesive strip is used to temporarily seal the margin of the cap to the wearer's head. The cap also contains a circumferential foldable crease (or fold-line) located behind the adhesive strip which allows the wearer to fold back the adhesive strip until the cap is properly positioned on the wearer's head. The cap further contains a circumferential border located immediately behind or in front of the foldable crease (or fold-line) which border prevents the adhesive strip from contacting the wearer's hair.