Encases the mattress for complete protection from bed bugs, allergens, liquids and stains;Deep pocket design accommodates mattresses 6 to 18 inches deep - bottom elastic creates a smooth, secure fit;Thin, hypoallergenic fabric is quiet, smooth and breathable and will not change the feel of your mattress;100 percent waterproof with watertight zipper and sealing bug flap;California King size mattress protector measures 72 inches by 84 inches and comes with a 15 year product warranty