Pet Support Systems X-Large Washable Orthopedic Gel 4 lb. Memory Foam Pet Bed, 40" X 35" X 4.5", Chocolate Suede Medical Grade Quality 100% Hypoallergenic 4 inch Certi-Pur Certified Foam Pet Bed. 2 inches of high density NON-TOXIC supportive base foam and a 1 inch (REAL) 4 lb memory foam and 1 inch of Deluxe GEL Memory Foam topper for perfect molding support and temperature control for your large or small aging dog or puppy that you want to protect from future aging issues. Our water resistant inner lining to protects the foam from absorbing any accidents or bodily fluids from your pet. Our pet beds are made to last and to be as user friendly as possible. Covering our superior foam with our inner water resistant lining is a durable 12oz zippered removable denim fabric. Pet Support Systems pet beds are made from 20 years of mattress ingenuity. We have been making ultra luxury therapeutic memory foam dog owner beds for almost 20 years. Every bit of comfort and manufacturing technology that goes into our people beds goes into our pet beds. Made from high density 4 lb Deluxe GEL Memory foam to instantly contour AND support your dogs bone structure and posture to relieve pressure and ease pain from arthritis your loved pet will sleep more soundly and experience relief from pain as well. Additionally, our foam is antimicrobial to resist odors, dust mites, mold and bacteria to help maintain a hygienic environment for all. Best of all, we are so confident that you and your pet will love this bed that we fully stand behind our products 100% We offer a 30 day 100% satisfaction guarantee and a 3 year manufacturer warranty on materials and workmanship.