The Ultimate Swim Diaper provides three layers of accident protection with snug-fitting legs and waist to help prevent harmful bacteria from entering the water. The waterproof outer layer helps prevent leakage while the absorbent inner layer absorbs wetness. The layer closest to your baby's skin has a wickaway lining to pull moisture away from the skin.Longer Legs, a wide comfortable waistband with tie-drawstring and coordinating trim give these trunks an updated look.