Petbed4less's premium high density memory foam dog bed is orthopedic grade for support and ultimate comfort. They will not flatten overtime as it's made of true one piece 100% memory foam, not mixed or layered memory foam. It can relieve your pet's aches and pains in their joints. It's great for pets with arthritis, hip dysplasia and joint and muscle stiffness. The bed comes with 3 layers of covers: waterproof internal liner, external Gray Suede zipper cover and super soft fleece waterproof dog blanket in cream color. Pets would love to sleep on super soft fleece dog blanket in cold weather. Waterproof dog blanket is attached on the top of suede cover with velcro. It can be used independently when detached. So you get two products in one package.