One-Piece Swimwear: Old Navy Womens Smooth Dri-Fit Surf Swimsuit Super hot & sexy Old Navy swimsuit lets you feel comfortable and look great! Great Fabric: 88% nylon, 12% spandex; Hi-tech material for quick dry and comfortable wear. Unpadded wireless bra with adjustable tying strings that can be tied on your neck for an elegant look. Fully lined front panel; Backless structure.