JoJo Maman Bebe Baby Boys' Newborn Reusable Swim Diaper 100% Polyester Imported Machine Wash 100 percent polyester Practical, reusable swim nappies designed to keep accidents contained without the use of another nappy underneath Designed to be a snug fit at the waist and leg otherwise they just don't work so if you have a baby with gorgeous chunky thighs it might be worth trying the next size up Machine washable at 30 degrees