Created with machine washable, soft, flannel as well as two layers of soaker fabricand an inner layer of PUL fabric (Polyurethane Laminate), creating a waterproof, all-in-one belly band. Once soiled, simply toss the entire band into the washing machine for reuse. It has a 2″ wide secure Velcro fastener to keep it snug and tight. They make a great over-night solution when you add a sanitary napkin to the band, doubling the absorbency.