These are pocket cloth nappies that have an outer shell made of waterproof polyurethane and an inner soft fleece lining that pulls away moisture from your babies skin to keep it dry and rash free. In addition to this there is a pocket opening. This allows you to stuff the pocket with a terry insert to allow absorbency. The nappies are secured using the adjustable poppers that allow you to adjust the size according to your babies changing shape. The design has been altered slightly to improve this nappy. For more information regarding the correct size to purchase please look at the Fuzzi Bunz size chart on our home page.