The Splash About HAPPY NAPPY for swimming...So simple and yet so effective, no ties, no Velcro, no elastic. IT WORKS!! Designed by us with swim teachers, parents and babies in mind! The swim nappy is made of 1mm soft and stretchy neoprene and finished with supper soft and snug fitting deep bands of fabric with a high rubber content to keep those solids inside. Can be worn with or without a conventional swim nappy - a liner is advised for ease of cleaning. Highly recommended or insisted on now in most baby Swim schools throughout the UK. Tested and improved upon with the leading UK swim teachers.