i play. Baby Girls' One Piece Ruffle Swimsuit with Swim Diaper UPF 50+ 82% Nylon/18% Other Fibers Imported Machine Wash i play., Inc. is the original swim diaper manufacturer with over 20 years experience making, testing and improving our patented ultimate swim diaper The built-in i play. ultimate swim diaper provides layered protection. A waterproof layer, absorbent layer and a lightweight wicking layer Secure fit-trim and snug fitting around the legs and waist to contain solid matter No other diaper necessary 82% nylon and 18% lycra fabric Machine Wash