BIKMAN Boys Full Body Suit Hooded One Piece Swimsuit Sun Protection Swimwear 82% Polyamide and 18% spandex Be aware that the sizes are NOT American sizes.Sizes ran small.Please choose the size according to our measurements,based on height. Please order at least one size up if your kids are bigger than normal sized boys UPF 50+,protect skin from sun burn stretchy, breathable,quick-dry and comfortable to wear