Whether your baby plays in a public pool, takes a dip in the ocean, or just splashes around in your backyard, our swim diaper will contain the messes. Also perfect for swim lessons, swimming activities, etc. It's lightweight, stretchy, reusable, and snug. The inner mesh layer will let fluids through but retains solids. Adjustable drawstring design can adjust the waist easily. Our swim diaper can also be used as a training pant. The pants have a waterproof outer layer and a mesh lining to hold solids. It doesn't have a built-in absorbent layer. Babies can feel the wetness and they could learn to potty train. Comes in three sizes: Small for babies weighing 12-25 pounds. Medium for babies weighing 24-35 pounds. Large for toddlers weighing 32-40 pounds.