i play., Inc. Is the original swim diaper manufacturer with over 20 years of experience developing and testing a unique, patented, and approved swim diaper. Swim diapers have become an important health issue and public pools in over 27 states now require and encourage the use of approved swim diapers, which means waterproof pants with snug-fitting legs and waist. i play. swim diapers can help prevent embarrassing accidents, as well as provide ultimate secure protection for babies and swimmers. The patented triple-layer protection includes a wicking liner to pull moisture away from baby's skin and prevent diaper rash, an absorbent layer for protection outside the pool, and a waterproof layer to prevent unsanitary accidents.