The Happy Nappy Duo™ is the most advanced reusable swim nappy in the world. It’s the only nappy system you will ever need for your baby’s swim class. The classically form fitting outer layer is still the Happy Nappy™ you know and love, effectively preventing faecal leaks into the pool, but inside is a highly technical active silver inner layer, which is scientifically proven to kill pathogens that cause tummy bugs like Cryptosporidium, E.coli and COVID 19. Killing these bugs inside the nappy, before they can enter the water, makes the pool safer for your baby and for other swimmers too. Working with one of the world’s leading virologists and 4 years in development, the Silver lined inner layer is extremely gentle on babies' skin, but highly effective in destroying pathogens that can be found in faecal matter. But, that’s not all! Because the Happy Nappy Duo™ has been approved by swim schools as a double nappy system, it means you no longer need to buy disposable swim nappies to wear under the Happy Nappy™. Long lasting, reliable and with a naturally antibacterial layer to help stop the spread of infections, the Happy Nappy Duo™ really is the only swim nappy you will ever need.