Sleep Safe ZipCover Resort Waterproof Mattress Protector | Cal King 12" | Dust Mite & Bed Bug Proof Encasement Cover Premium waterproof protection from spills and bodily fluids like urine, perspiration, and blood Strong binding seam construction safeguards against dust mites, bedbugs, and other allergens High quality, complete 6-sided mattress encasement offers a 3-sided zipper for easy installation Comfortable, noiseless bedding solution perfect for allergy sufferers, children, pet owners, and more Machine washable, hypoallergenic, polyester zippered mattress cover with a cotton terry surface