Available in two sizes, Thirsties Swim Diaper is a beach or pool ready version of our popular Duo Wrap diaper cover. Size 1 fits babies approximately 6-18lbs and Size 2 fits babies roughly 18-40lbs. Thirsties Swim Diaper meets the requirements of most public pools. We’ve designed our swim diaper with your baby’s needs in mind. Mesh interior, a trim cut, customizable rise snaps, and uniquely designed hip snaps keep baby splashing in comfort. Thirsties signature double leg gussets and waterproof exterior shell will keep you and everyone else swimming worry-free!