The Charlie Banana¨ 2-in-1 Swim Diaper & Training Pants have a waterproof outer layer and a soft organic cotton interior lining which is gentle against your baby's skin. They make ideal training pants when potty training a child because of the trim fit, easy removal, and a fine absorbent layer to minimize little accidents. This is the perfect alternative to ugly, bulky, wasteful disposable baby swim diapers that don't retain anything.