The Size Adjustable Under Nappy that can easily adjust into small, medium and large sizes in a snap of a popper button to grow with your baby. Designed as part of the Happy Nappy Double Layer System, it fits securely under the Happy Nappy or Jammers for extra protection against leaks in the pool.
The Size Adjustable Swimming Under Nappy is an eco-friendly alternative to disposable swim nappies and designed to be long-lasting to fit for over 1 year, simply use the next row of poppers to provide extra room in the nappy when your baby grows!
It did its job but I found that because of the happy nappy over the top, my baby had red marks from the poppers after.
Good fit and able to last. Easy to use
I bought size Large for my 17 months old daughter and it fits perfectly. She will probably use it for another 6 months