Twin Xl 100% Waterproof Mattress Protector, Hypoallergenic, Breathable Soft Cotton Terry Mattress Cover, Protects Against Dust Mites, Allergens, Bacteria, Mold, Mildew, and Fluids, 10 Year Warranty. 100% Waterproof - repels all liquids including bodily fluids, perspiration, urine and accidental spills Hypoallergenic cotton terry surface and polyurethane backing inhibits allergy-causing dust mites and bacteria from living in your mattress Great for Those With Kids, Pets, Allergies, Asthma, Eczema Or Incontinence Machine Washable Fits mattresses 8"-24" in height and completely covers the mattress for added protection.