A swim diaper can be worn by itself or underneath a swim suit or swim trunks. They prevent baby's poo from getting into the pool. Swim Diapers (whether disposable or reusable) are however not absorbent. If they had absorbency in them, they would immediately absorb the pool water and weigh baby down in the water.
EARTH DAY SALE - 20% OFF Site-Wide 4/20-4/23