Waterproof Zippered Vinyl Mattress Cover (Twin) Vinyl Superior waterproof mattress protection locks out dust and moisture Waterproof And Hypoallergenic, Reinforced Rust Proof zipper for total protection Wipes clean with a damp cloth; Long Wearing Saty Soft Boilable Vinyl 100% Hypo-allergenic: Maximum Protection Against Bed Bugs,Dust Mites and Allergens Excellent for Bedwetting & Mattress Protection