Womens Old Navy Soft & Smooth Surf Swim Bikini Bottom Briefs Very flattering & high quality dri-fit swim bottom! Shell: 82% nylon 18% spandex; Lining: 100% polyester; Hi-tech material for quick dry and comfortable wear Covered elastic at waist and along leg openings for custom fit and comfort. Alluring fit; Full lining for comfortable wear High quality fabric and great construction make this an excellent product!