Turtle Tots Happy Nappy is an approved swim nappy is compulsory for all babies and must be worn over the disposable swim nappy or Turtle Tots aqua-nappy and underneath any wetsuits or swimsuits to prevent any accidents. The Turtle Tots Neoprene Nappy is designed for your baby's comfort with neoprene sleeves around the waist and the top of baby's legs to ensure nothing gets out!