This special material coupled with our unique 'seal to skin' binding at the legs and waist means you can be sure our Pop-in swim nappy will keep any little accidents safely contained in their swimmers, leaving you free to simply enjoy your splash about together. The Pop-in swim nappy can be used with or without a liner, and although it works perfectly well alone, using one can help make change time a little less messy! Please remember that a snug fit at the waist and legs is essential for the swim nappy to do its job properly. Available in 4 sizes. Key Features Reusable swim nappy with unique 'seal to skin' binding to contain any little accidents securely Soft laminate with fast wicking fleece layer and hidden waterproof membrane Stain resistant water repellent outer layer Rinse immediately after use and wash with similar colours Compatible with our Pop-in swim nappy liner for easier change times. Composition 100% Polyester with PU Laminate Additional Info If you need help with sizing, please use the information in the picture to assist in your purchase (please note that this is a guide only as all babies are different). Please measure the top of your baby's thigh and around their waist and use the table as a guide for which size is best for your little one. Please remember a snug fit at the waist and legs is essential for the swim nappy to do its job properly!