Baby Infant Toddler Boys Board Shorts Swim Trunks with Built in Swim Diaper by Iplay - Black - 4T / 38-46 Lbs Polyester Machine washable. Board shorts have longer legs and a wide comfortable waistband with a faux tie drawstring for a stylish look. Ultimate Swim Diaper has a super absorbent inner layer and a wick away lining next to baby's skin. No other diaper necessary! Iplay swim diapers are approved for public pools. Fabric is UPF 50+ for excellent UV protection. Coordinate board shorts with Iplay rashguard swim shirts for added sun protection.