Nike Swim Women's Hydrastrong Fastback One Piece swimsuit is made of Nike HydraStrong fabric to ensure long lasting durability. The Women's Nike Swim Performance Racerback One Piece embodies ultimate performance in a lightweight, one-piece swimsuit. Crafted with lightweight Nike Performance Poly fabric to withstand long sessions in chlorinated water, it retains color and stretch so your suit remains durable and comfortable for longer. Flat seams ease comfort with reduced chafing and thin racerback straps give you enhanced support and optimal range of motion. THIN RACERBACK STRAPS for support and optimal range of motion Moderate back coverage FLAT SEAMS move smoothly against your skin to enhance comfort Ergonomic enhanced fit Internal lining