Fluidproof. rubber feel. fitted pillowcase. High quality. tough and tactile and fluid proof. these pillowcases are designed to protect your pillows from all your bedroom fun. Breathable and machine washable. With a seam-free top surface. it is two-ply and engineered. Features a rubber feel. polyurethane fabric. Put it in the wash and go again. King size. @SANFRANCISCO