Bed Bug Mattress Protector - Waterproof & Hypoallergenic - Protects Against Bed Bugs, Dust Mites, Allergens, and Bacteria - Premium Fitted Design to Cover Your Mattress - 10 Year Warranty - Money Back Guarantee (Twin XL) Cotton Zippered Encasement - Bed Bug Resistant - Fully Encases Mattress 100% Waterproof and Breathable Protects against Bed Bugs, Allergens, Dust Mites, and Bacteria 100% Cotton Terry surface absorbs moisture Polyurethane Membrane allows air passage, but blocks liquids