All Water Babies swimmers must wear the approved Double Layer Nappy System. This can be either an approved preferably reusable inner layer and approved outer layer, such as a Happy Nappy™ or Splash Jammers™, or a DUO™ product with both layers built in.

Standard products such as Happy Nappy™ and Splash Jammers™ are approved outer layers and must be worn with an approved reusable inner layer. DUO™ products already include both layers, so no additional nappy wrap or under nappy is required.

Yes. Potty training status does not change Water Babies requirements. Any Water Babies swimmer must wear the approved Double Layer Nappy System during lessons. If your child is attending Swimvincible lessons, appropriate swimwear is all that's required and the Double Layer Nappy System is not needed.

Reusable swim under nappies and wraps are a practical choice for regular swimmers. They can be washed and reused, making them a convenient and more environmentally friendly option compared with buying disposable swim nappies for every lesson.

Happy Nappy™ styles are popular for babies and younger toddlers, while Splash Jammers™ and Jammer DUO™ offer a more sporty, grown-up design for older children. All provide reliable protection when used as directed.

A snug fit around the waist and thighs is essential for effective leak protection. Always check the sizing guide and choose the size that best matches your child's measurements rather than sizing up for growth.