Linenspa 34" x 52" Non Skid Waterproof Sheet Protector with Highly Absorbent Fill Layer and Soft Cotton Blend Cover Cotton Waterproof layer protects your sheets and mattress from fluids and accidents - no more middle of the night bedding changes. LINENSPA Sheet Protectors can hold up to 8 cups of liquid and can be used for a quick cleanup for bedwetting or incontinence Cotton blend fabric quilted with a highly absorbent layer of soft fill offers breathable comfort that is quiet and dry Non-slip backing prevent shifting to protect sheets and mattress Reusable pad is machine washable and dryer safe This 34" x 52" underpad is designed to be placed directly under the sleeper on any mattress size