EVEREST PREMIUM PLUS Mattress Encasement 100% Stretch Knitted Polyester Micro Filament Fabric. Not Vinyl, Plastic or other cheaper material. Premium Zippered Six Sided Cover SIZE FULL (54"X72") + 5" DEPTH (fits 4"- 7"). Size 54" x 72"- IF YOU ARE UNSURE ABOUT THIS SIZE FITTING YOUR CUSTOM MATTRESS, PLEASE CONTACT US FOR ASSISTANCE.STRETCHABLE STRONGER Fabric along with thick PU Lamination on All Six Sides: Top, Bottom and all other Four Sides, makes this protector/ cover Extra Durable and Waterproof. DOUBLE SIDED USE Since Top and Bottom layers have same Fabric and Lamination, it's easier to flip the mattress as desired without changing the mattress encasement side..VELCRO PATCH at the Premium Zipper end of the encasement. The package will say 5" depth, but it will stretch to fit up to 7" depth mattress due to 100% Stretch Knitted Polyester Fabric..Water Proof, Breathable, Fully Encased & Machine Washable. Recommended for people with Asthma, Respiratory Conditions, Eczema, Incontinence, Pets, Kids..HOTELS, MOTELS, RESORTS, Airbnb, bed & breakfast, nursing homes, hospitals, homes, apartments, college dorms, RV, rentals & many more useful places. Encasement cover is fully Machine Washable in cold-warm water & Dryable with tumble dry low heat dryer temp. cannot exceed 115*F, cannot use bleach or be ironed.