Heading to swim class or the pool with your little one? The Splash About Happy Nappy is the gold standard, trusted by swim schools worldwide for one reason: it really, really works to contain accidents. This isn't a disposable diaper—it's a reusable swim diaper made from super-soft, 1mm thick neoprene and high-grade Lycra. It's gentle on baby's skin, has no tight elastic to leave marks, and moves with them in the water. The secret is in the snug ribbed seals around the waist and thighs that create a reliable barrier. It's so effective that there hasn't been a reported leak in over 7 years! It provides UPF 50+ sun protection and is chlorine-resistant, so it lasts. You can use it alone for full protection, or layer it with their cotton diaper wrap and biodegradable liners for easier clean-up (sold separately). Hand wash in cool water and air dry—no machine washing. It comes in adorable prints and is part of Splash About's commitment to being eco-friendly. For peace of mind and a leak-free swim, this is the diaper swim instructors insist on. Make sure it says Splash About—it's the only authentic Happy Nappy.