Happy Nappy™ Sunsuit
The Happy Nappy™ Sunsuit brings our award-winning reusable swim diaper and a lightweight UPF 50+ rash guard together in one baby swimsuit. Sun and leak protection are taken care of in a single outfit, so you can relax and enjoy those first splashes together.
Sizes run from 0-3 months up to 2 years, so there's a fit for their very first summer and for the next one too, when the Sunsuit becomes a toddler swimsuit for pool days and beach vacations. Choose the print you love most below; whichever you pick, the same snug, comfortable fit sits underneath.
How do I choose the right size?
If this is your baby's first swim diaper, the size is the part that matters most, because the built-in Happy Nappy™ keeps leaks in by sitting snugly at the waist and thighs. A few minutes with a soft tape measure is all it takes. Here's what to check:
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Lay your baby down flat to measure, a little while after a feed rather than straight after
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Measure gently around the tummy, across the belly button
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Measure around the fullest part of each thigh
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Once it's on, you should be able to slide a finger comfortably around the edges of the seals, with no red marks on their skin
If your baby is between two sizes, compare their measurements with our size guide, and if you'd still like a second opinion, get in touch. We're always happy to help you find the right fit.
Happy Nappy™ Sunsuit FAQs
Not with the Sunsuit. The swim diaper is already built into the bottom of the suit, so there's no separate Happy Nappy™ to remember and nothing to add on top. That's one less thing to pack in the swim bag.
Our standalone Happy Nappy™ swim diaper works on its own for general swimming too. If you're heading to swim classes, some ask for a double diaper system, where a wrap from that range usually goes underneath rather than anything going over the top. Your swim teacher will be able to tell you what their pool needs.
Look for UPF 50+ first. It's the top rating swimwear can carry, and it blocks 98% or more of the sun's UV rays, which matters for skin as delicate as a baby's.
After that, sleeve length makes the biggest difference. The Sunsuit's rash guard has 3/4 sleeves, so your baby's shoulders and upper arms stay covered while they splash and play. Do still apply sunscreen to anything the suit leaves bare, such as their face and legs.
No, and it isn't designed to. Like any swim diaper, it lets water pass in and out, so it never soaks up the pool and turns heavy on your baby. What it's built to hold in is poop, and it does that reliably. Pop your baby into a regular diaper as soon as they're out of the water and they'll be comfortable for the trip home.
Not quite: Splash About is us, and the Happy Nappy™ is our best-known invention. We've since built it into our baby wetsuits and swimsuits, including this Sunsuit, so families can rely on the same trusted design wherever they swim. Happy Nappy™ is our trademark, and you'll only find the name on our products.