This Sleepy's Deluxe Comfort Cool Mattress Protector checks all the boxes: it’s cooling, fully waterproof, anti-microbial, and provides the added comfort of a mattress pad—all while shielding your mattress from stains, allergens, dust mites & more. Plus, five-sided protection and an antimicrobial Silvadur treatment fights bacteria so you can rest easy. The cushioned protector feels like a cooling mattress pad with all the benefits of a waterproof protector—at a great value. King - 79"x 80"x 16.5"(Fits Mattresses up to 18.5"deep) Waterproof barrier 5-Sided protection, designed to completely encase the mattress Cooling Technology:The cushioned surface creates a cool sensation and enhances the cooling benefits of your mattress Antimicrobial Silvadur treatment helps fight bacteria 3" Motion Grip™ bands to secure protector on mattress, 1.5" elastic band all around Adjustable base friendly; 3" Motion Grip™ bands secure protector to mattress with no risk of coming off Machine washable PACKAGE was opened but is not used. Item was not returnable to the store.