GoodGram Hypoallergenic Waterproof Anti BedBugs/Dust Mites Zippered Mattress Cover Protector with Bed Bug Blocker - Assorted Sizes (King) Features: 100% Anti Bed Bugs, Dust Mites, Allergies, Waterproof, Triple Layered Stain & Water Resistant Coating What's Included: (1) Zippered Mattress Cover (Total Mattress Encasement) Fabric Content: Polyester Care Instruction: Machine Washable Triple Layered Total Mattress Encasement Water Proof/Resistant Allergen Protector Bed Bug Blocker Stain Resistant Dust Mite Blocker Deep Pockets Stretch Sides For Easy Installation Seam Binding & Interior Barrier Flap Ideal For Box Springs As Well Size: King