i play. Baby Girls' Ultimate Swim Diaper Bow Tanksuit 50% nylon/50% lycra Machine Wash Stretchy one-piece tanksuit has ruffle and bow trim with criss-cross back straps Nylon, lycra with polyester lining Built-in ultimate swim diaper: waterproof outer layer, super absorbent inner layer and wick-away lining next to baby's skin I play swimwear is made from specially treated fabric with a uv protection factor of 50+