100% Waterproof, Hypoallergenic, Premium Fitted Cotton Terry Cover Sureguard Premium Cotton Terry 100% Waterproof - Top protection against perspiration, bed wetting, liquids and stains; 10-year quality guarantee (NOTE: For six-sided protection, buy a SureGuard Mattress Encasement). Keeps Your Mattress Clean Fresh - Blocks dust, dirt and dander on the top side. Buy together with SureGuard Pillow Protectors. Soft Noiseless - 100% cotton terry surface; Wicks away moisture; Retains the feel of your mattress - Free from Vinyl, PVC, Phthalates, fire retardants and other toxic chemicals Durable Easy to Clean - Machine wash dry - For frequent accidents, buy 2 or more - while one is washed, the other protects the mattress Twin XL / Dorm bed (39 in x 80 in) - Fitted Sheet Style; Stretchable skirt fits any depth mattress; Buy 2 for a Split King. Independently lab tested and GREENGUARD Gold certified.