Twin (13-16 in. Deep) SureGuard Mattress Encasement - 100% Waterproof, Bed Bug Proof, Hypoallergenic - Premium Zippered Six-Sided Cover - 10 Year Warranty Cotton 100% Waterproof - Six-sided premium mattress protector blocks perspiration, bed wetting, liquids and stains; 10-year quality guarantee (NOTE: For frequent accidents and easy clean-ups, place a fitted SureGuard Mattress Protector over the encasement). Bed Bug Proof - Super fine zipper with Invisi-Zip and SureSeal technology completely seals off the mattress from bed bugs - use with a SureGuard Box Spring Encasement Hypoallergenic - Blocks dust mites, allergens, bacteria, mildew and mold - use with SureGuard Pillow Protectors Soft & Noiseless - 100% cotton terry top; Wicks away moisture; Retains the feel of your mattress - Free from Vinyl, PVC, Phthalates, fire retardants and other toxic chemicals Twin (39 in x 75 in) - Fits 13 to 16 inches deep; Zippered Mattress Encasement - Machine wash and dry. Independently lab tested and GREENGUARD Gold certified.