Aller-Ease 2-in-1 Mattress Pad with Removable Hot Water Washable Top Pad, Twin X-Large Removable Pad Top: 100% Polyester Imported Features removable top pad that is hot water washable to kill germs and bacteria Allergen barrier protection for both pad and mattress Mattress Protector is waterproof to protect mattress from spills & stains Fitted construction for easy installation Fits mattresses up to 18" deep