The Patagonia Women's Sunamee Side Tie Bikini Swim Bottoms are a full-seat-coverage bikini bottom with side ties and across-the-hip fit. Features: Durable nylon/spandex blend Straight-across-the-hip fit Lining in front is made of a soft nylon/spandex knit blend Fabric: Outer: 82% nylon/18% Spandex Lining: 88% nylon/12% Spandex jerseySee "Overview" below for more sizing information.