FurHaven Deluxe Orthopedic Outdoor Water-Resistant Mattress Pet Bed for Dogs and Cats, Mocha Brown, Medium Medical-grade orthopedic foam core relieves joint pain and promotes better circulation Zippered, removable cover for frequent washing to keep the bed looking and smelling fresh Polycanvas base protects furniture and floors Perfect for elderly and disabled pets or those that could benefit from extra support Medium; 20 x 30 x 3