Four layer protection: soft quilted cotton/polyester surface, soft polyester fiberfill layer, super absorbent high density inner layer, and a vinyl waterproof non slip barrier. Absorbs quickly and locks in moisture for the best in skin care up to 6 cups Softly brushed fabric with non-slip backing. Protects bottom sheet and mattress from moisture and staining. Machine wash and dry, up to 300 washings, for children and adults.