All About Happy Nappy

The best reusable swim nappy in the world

Happy Nappy™ is a reusable fitted neoprene swim nappy, trusted by parents worldwide and endorsed by swim schools across 30 countries. Designed by Splash About, it is also the only brand that Water Babies rely upon to keep our pools clean and safe during swimming lessons.

View all Happy Nappies

“Ergonomically designed to move with the baby as they kick and move about in the water, the Happy Nappy is shaped to cup baby’s bottom, whilst specialist waist and thigh ribs fit snugly to the child’s body, forming a seal that prevents any solids leaking out.”

Our pick for lessons

Happy Nappy DUO

Choosing a Happy Nappy DUO for your Water Babies lessons offers several benefits:

Twice as safe: the DUO does not only protect against solid leaks to the pool. Thanks to its silver lining inner layer, it also helps destroy bacteria and viruses that chlorine alone can't.

Hassle-free: as the DUO has been approved as an all-in-one Double Nappy System, there's no need for under nappies during swimming lessons, making cleaning and changing easier.

Economical & Eco-friendly: because the DUO is a 2-in-1 swim nappy, you won't need to purchase any nappy wraps to wear underneath, making it a more cost-effective option in the long run. You will also be generating less waste and contributing to keep down the number of under-nappies in landfill.

Classic or duo?

Choosing your Happy Nappy

Did you know that there are 2 different types of Happy Nappy? Both of them are equally reliable, with the safest, most leak-free fit. So what's the difference between them?

Classic Happy Nappy: the original Happy Nappy, made from 1mm neoprene. This is an ideal alternative to disposable swim nappies. Just bare in mind your little one will still need to wear an under nappy or nappy wrap during Water Babies lessons, to conform with the Double Layer Nappy System.

Happy Nappy DUO: with the same reliable features of the classic Happy Nappy, it incorporates a built-in active silver inner layer, scientifically proven to kill pathogens, meaning a safer swimming environment for all. The DUO is a 2-in-1 reusable swim nappy, approved by Water Babies as an all in one double nappy system.

The Double Nappy System

Swim Nappy Liners & Wraps

Most of baby swimming schools, including Water Babies, use a Double Layer Nappy System. This means that, to help prevent leaks and to make changing and cleaning easier, your little one will need to wear an under-nappy underneath the Classic Happy Nappy, Splash Jammers or any of the Happy Nappy range, except the DUO, which is a 2-in-1 reusable swim nappy.

there's so much more!

Happy Nappy Swimwear

Happy Nappy is much more than a reusable swim nappy. You can now find a whole range of Happy Nappy products, such as wetsuits or swimming costumes. All of them featuring a built-in Classic Happy Nappy.


Ready to take the plunge?

Splash Jammers

Outgrowing the Happy Nappy? Also designed by Splash About, the Splash Jammers are an ideal alternative to swim nappies for toddlers and older children. Made from comfortable soft neoprene with snug waist and medical grade silicone seals around the thighs to hold any solids, these swim shorts are as effective as the Happy Nappy, but in a more grown up and sporty design!

The importance of swim nappies

Why do I need swim nappies?

Swim nappies are one of the most important things to think about when you’re getting ready for your little one’s swimming lessons. Unlike regular diapers, swim nappies are designed to prevent leaks and provide a comfortable fit while in the water, ensuring that accidents don’t affect the overall experience for both little ones and carers.

Designed for Safety & Comfort


Swim nappies are designed to contain solid waste and prevent it from leaking into the pool, while allowing liquid to pass through. They play a vital role in maintaining the hygiene and cleanliness of the pool, ensuring a safe environment for all swimmers. Your Happy Nappy will prevent accidents from affecting the pool’s water quality, reducing the risk of spreading germs and bacteria, and avoiding pool closures.


Regular diapers become heavy and uncomfortable when wet, which can hinder a baby’s movement and enjoyment in the water, turning into a water safety hazard. Happy Nappies are designed to stay lightweight and comfortable in the pool. By using Happy Nappy, you can enjoy worry-free water time and focus on what really matters, making a splash with your little water baby.


Happy Nappies are designed to be hassle-free; they are easy to put on and take off, especially in a wet environment. Made from soft 1mm neoprene, they can be washed and reused multiple times. Reusable swim nappies are an eco-friendly and cost-effective option in the long run, plus they come in multiple colours and designs to fit your little one's unique style.