éFeature 3 size for choose£oSize S: for baby aged 12-18months; Size M: for baby aged 18months-2 Years old; Size L: for baby aged 3 years old (These size suggestions are just for your reference, please choose the right size for your baby according to the real waist and leg measurement of your babies,thanks!)Elastics waist and legs: Interior Polyester Elastics at the waist and leg openings with soft lycra bindings provides a secure, stretchy fit and easy on and off. Outer: waterproof 100% Polyester with PUL,designed for holding solids.Inner: Polyester Mesh(easy to clean up, offering comfort against baby's sensitive skin). 2-layer microfiber insert sewn-in the swimming diaper.3x3 snaps:to adjust the size Elastics waist and legs: provides a secure, stretchy fit and easy on and off Size Waist(Tile size): S(33cm), M(36cm), L(45cm) Waist(Stretched size): S(60cm), M(64cm), L(72cm) Leg(Tile size): S(23cm), M(25cm), L(29cm) Leg(Stretched size): S(36cm), M(40cm), L(45cm) Material Outer: waterproof 100% Polyester with PUL,designed for holding solids.Inner: Polyester Mesh(easy to clean up, offering comfort against baby's sensitive skin). 2-layer microfiber insert sewn-in the swimming diaper.Use: Easy-lock snaps on one side. A snug fit in the legs and waist are key to avoid leaks.Package: 2 swim diapers Care Nappy should be changed every 2-3 hours, and when damp, to prevent nappy rash.Nothing goes underneath swim diaper, and you need to make it snug to contain the poop. Line dry/Low tumble dry only. Friendly Reminder Remove and rinse off the residuals (knock solids into toilet), then store in dry pail Hand/machine wash cold/warm on gentle cycle.Line dry/Low tumble dry only. Having happy shopping experience!é