Happy Nappy Duo™
The Happy Nappy Duo™ swim diaper is the most advanced reusable swim diaper we make. It’s a complete double diaper system in a single garment, with a silver-lined inner layer, so your baby needs nothing else underneath at the pool or the beach.
If you’re getting ready for your baby’s very first swim, you might not know that a regular diaper won’t work in the water. It soaks up the water around it, swells, gets heavy and pulls down. The Duo is made to stay snug instead. It holds in fecal leaks and lets water pass in and out, so it never gets waterlogged.
If you’re looking for swim diapers newborn babies can wear from their very first swim, the Duo starts at Small (0-3 months) and comes in seven sizes up to 4-5 years. We size by measurement rather than by number, so even if you’d normally pick swim diapers size 1, measure your baby first. Lay them flat, ideally not straight after a feed, and measure around the tummy and the fullest part of the thigh.
The best swim diaper is the one that sits snugly at the waist and thighs, with room for a finger around the seal and no red marks. Our size guide will help you find that fit, and then you can choose a print your little one loves from the range below.
Happy Nappy Duo™ FAQs
The Happy Nappy™ is a single-layer swim diaper designed specifically to contain
solids, providing a secure and reliable fit.
The Happy Nappy Duo™ offers a similar fit but includes an additional inner layer, which has been scientifically developed to help protect against germs.
No, the Happy Nappy Duo™ is designed to be used without any other swim diaper underneath. It is recognised by most US swim schools as a double diaper system, so no additional under-diaper is required.
The Happy Nappy Duo™ requires a correct fit for complete fecal leak protection. Since babies vary in size, it's essential to measure your baby accurately and consult the size guide for a snug fit around the waist and thighs. Measure your baby while lying flat and not immediately after a feed. Take measurements around their tummy, across the belly button, and at the fullest part of their thigh. When worn, there should be enough space to fit a finger comfortably around the edges of the seal, with no red marks.
As with disposable swim diapers, the Happy Nappy Duo™ does not hold in urine. It is designed to allow water to pass in and out of the diaper to prevent it from becoming waterlogged. However, it is incredibly reliable in containing solids.
To keep your Happy Nappy Duo™ in good condition, we recommend hand washing in cool water and drying away from direct sunlight. However, we understand that soiled diapers may occasionally require machine washing. If you need to machine wash, please do so at 85°F using a non-biological detergent. Please note that frequent machine washing may affect the longevity of the product.