Superior quality 100% 50"X42"X6" solid true therapeutic memory foam be able to support your pet up to 200 lbs and will not flat overtime compare to other bed. The memory foam will be firmer when cooler and reacts to body heat and weight, allowing it to mold to a warm body in a few minutes. We use the similar memory foam which sold in high end therapeutic mattress store to promote better sleep, healthy joint and long lasting. * It comes with luxury 6" thick 3 lbs high density memory foam with orthopedic rating to provide the maximum support. Memory foam is famous for its ability to contour with great accuracy to a body at rest for maximum comfort and orthopedic support. It is five times denser than regular foam and temperature sensitive. Memory foam is also highly resistant to bacteria, mold and mildew, and dust mites. Great for pets with Arthritis and all sizes pet. * The external fabric cover is luxury Microsuede fabric with zipper in size 50"X42"X6". The external cover is made by 190GSM weight MicroSuede / Faux Suede fabric for better durability as seen in many luxury blazer or suit jacket . The cover is stains, dirts and wrinkle resistant, re-usable many times and machine washable. Only internal zipper cover is waterproof to prevent the water leaking into the pad under normal use. * 2 layers of fabric cover : Brown color fabric external zipper cover + Waterproof internal zipper cover for comfort, easy cleaning and maintain. Unlike any other cover, our new improved hidden zipper with eyelid design plus extra stitching boasts lasting quality, wash after wash. * Why spend more money to replace the poly-fill bed regularly while you can get a luxury comfort foam bed that your dog will love and last longer with easy maintain? Additional replacement cover are always available here at my other listing with combine shipping discount.