The Rash guard Shirt & Bow Swimsuit Bottom Set with Built-in Reusable Absorbent Swim Diaper makes learning to swim fun and comfortable. The quick-dry material supports baby's active play, and the cap sleeves allow baby to stretch and move. No other diaper is needed with the pull-on style bottom with built-in Swim Diaper. i play. is the original Swim Diaper manufacturer and has a patented three-layer design. The wicking liner helps prevent diaper rash, the inner absorbent layer helps protect against messes outside the pool, and the waterproof outer layer works with the snug-fitting waist and legs to provide secure protection from unsanitary and embarrassing accidents in the pool. The Rash guard Shirt & Bow Swimsuit Bottom Set has pretty colors made with azo-free dyes, and made from formaldehyde-free, UPF 50+ material to protect baby from the sun Parents love the easy pull-on neck opening and reusable Swim Diaper, and it is machine-washable.