MALOUF SLEEP TITE ENCASE HD Lab Certified Bed Bug Proof Mattress ENCASE HDment Protector - Hypoallergenic - 100% Waterproof - 15 Year Warranty - Vinyl Free - Twin XL 100% Polyester Imported Six-sided bed bug proof protector encases entire mattress - accomodates mattress depths from 6 to 22 inches Top portion can be zipped off for convenient laundering Smooth polyester surface is quiet and breathable Deep pocket design fits mattress depths up to 22" Waterproof and bed bug proof zipper