You love your mattress. It's soft and comfortable, and it feels like sleeping on a cloud (or at least that's your best guess, seeing as how you've never actually slept on a cloud). What you might not realize, is that you could be sleeping on a cloud of dust mites, which could be causing you to suffer from allergies. This Hypoallergenic 100% Waterproof Terry Cotton Mattress Protector keeps your mattress protected from dust mites and other allergens, leaving you breathing easy and sleeping comfortably. This cover fits extra-thick mattresses with deep pockets of up to 18" , they are water resistant, and serves as a barrier to nasty bed bugs, keeping you and your mattress safe. All Sizes Available: Twin, Twin XL, Full, Queen, King and California King