Reusable Swim Nappy | Baby & Toddler Swim Diaper

We recommend starting with at least 2 of each size — and here's why.

✓ Accidents happen (that's literally what they're for!) and having a second one ready means you can get straight back in the water without cutting the swim short

✓ If you swim frequently, one can be air drying while the other is ready to go

You really don't need more than two. Just enough to keep the fun going without missing a moment in the water.

Betty Lyn comes in six sizes from newborn to toddler (0–4 years). We recommend checking the size guide and buying two in your current size — one to wear and one for backup. When your little one grows, just size up. No need to replace the whole stash at once.

Nope. Betty Lyn reusable swim nappies meet pool sanitary requirements just like disposables — without the ongoing cost or the last-minute store run. One Betty Lyn nappy washes and reuses swim after swim, all season long. Most families buy two in each size so they always have a backup ready.

Easy. If it gets dirty at the pool, rinse it out and pop it in a wet bag until you get home. Then toss it in the washing machine on a cold gentle cycle and air dry. That's it. No special detergent, no complicated routine — just wash and go again.

Yes — and here's why that matters. Betty Lyn was designed by a swim school owner who literally cannot have accidents in her pool. She built this nappy to solve her own problem, which means the leak protection isn't an afterthought — it's the whole point. The double-layered gusset keeps solids contained so you can focus on the fun, not the fallout.

Totally up to you. Betty Lyn nappies work as swim shorts on their own — they're cute enough to wear solo with a swim top, or you can layer them under a one-piece or rash guard for extra coverage. The fabric is SPF 50+ protected either way, so your baby is covered whether you go with or without.