HOSPITOLOGY PRODUCTS Sleep Defense System - Waterproof/Bed Bug/Dust Mites - PREMIUM Zippered Mattress Encasement & Hypoallergenic Protector - 54-Inch by 80-Inch, Full XL - Standard 12" Polyester 100% Waterproof Barrier on all 6 sides of mattress; Independently lab-tested to be 100% Bed Bug Proof Zippered mattress cover stretches to fit any mattress depth from 12" to 18" Extra-soft 100% Polyester Knit fabric is cool and comfortable; Breathable waterproof membrane won't trap heat while you sleep Help ease Asthma and other Respiratory conditions by blocking allergens as you sleep 5-year Limited Manufacturers Warranty