HomeCrate Natural Sleep Defence - Luxurious Waterproof/Bed Bug Proof Mattress Encasement - 39" 75" Twin, Polyester PROFESSIONAL QUALITY PROTECTIVE BEDDING; 100% Waterproof Barrier on all 6 sides of mattress; Independently lab-tested to be 100% Bed Bug Proof MATTRESS ENCASEMENT FIBER CONTENT; Extra-soft Polyester knit fabric is cool and comfortable, Breathable waterproof membrane won't trap heat while you sleep, and can be easily wiped clean and wont stain, EASIEST MATTRESS PAD; 3 Sided zippered mattress cover easily stretches to fit any mattress depth from 9" to 15" ALLERGEN PROTECTION; Help ease Asthma and other Respiratory conditions by blocking allergens as you sleep, it protects against Dust Mites, Perspiration, Urine & other fluids too. WARRANTY; 10 Year Limited Manufacturers Warranty.