The Aller-Ease Hot Water Washable Mattress Pad blocks out allergens while adding an extra layer of comfort and softness. Allergen proof fabric prevents dust mites, pollen and other particles from collecting and triggering allergy or asthma symptoms. Can be washed in hot water to combat germs and bacteria. 65% cotton, 25% polyester. Machine wash hot, tumble dry low heat. Aller-Ease Hot Water Wash Cotton Polyester Blend King Mattress Cover in White | 11926ATC