Mattress Protector & Allergen Bed Cover Pads - Queen, King, Twin, Full, Cal, Pillow Top and Crib Sizes. Vinyl Free, Zippered, Hypoallergenic, Waterproof Covers, Bedbug, Dust Mite Proof &ndash; Twin XL Size Polyester 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 Mibio Mattress Protector over the encasement). Bed Bug Proof - Super fine zipper with MibioSeal technology completely seals off the mattress from bed bugs - use with a Mibio Box Spring Encasement Hypoallergenic - Blocks dust mites, allergens, bacteria, mildew and mold - use with Mibio Pillow Protectors Soft & Noiseless - 100% cotton polyester top; Wicks away moisture; Retains the feel of your mattress - Free from Vinyl, PVC, Phthalates, fire retardants and other toxic chemicals. Great For Those With Kids, Pets, Allergies, Asthma, Or Eczema Twin XL (39 in x 80 in) - Fits 13 to 16 inches deep; Zippered Mattress Encasement - Machine wash and dry. Will Not Change The Feel of Your Mattress