4 years in development with leading virologists, the silver lining in this exclusive nappy wrap is scientifically proven to destroy pathogens such as Cryptosporidium and E-Coli, so they are destroyed before the germs even enter the water. The Silver Nappy Wrap is designed to be worn under the Happy Nappy to form part of the double nappy system insisted upon by many swim schools across the country. Not only are the silver ions a natural agent, but they can also help to soothe sore bottoms and nappy rash. Available in 3 sizes to fit under the Happy Nappy.