AllerZip Smooth Waterproof Bed Bug Proof Zippered Bedding Encasement, King, (Fits 7 - 12 in. Deep) Waterproof: Polyurethane film backing repels liquids like urine and sweat on all six sides Breathable Barrier Fabric: NOT hot to sleep on. Allows body vapor to breathe through pad. 3-sided zipper lock is certified barrier for bed bugs, dust mite and allergens. Easy to Wash and Use: Machine washable in warm or hot water. Tumble dry on medium heat. Fits King Size Mattresses 7-12 inches deep- 76 x 80 in.