Brindle 4 Inch Memory Foam Orthopedic Dog Bed - Removable Velour Cover with Waterproof Liner 100% Waterproof encasement beneath the fabric cover protects bed against accidents and fluids 4 inch thick bed features 2 inches of comfort memory foam and 2 inches of high-density support foam Soft, supportive consistency conforms to weight and pressure to relieve achy joints, arthritis and hip dysplasia Super soft, zippered velour cover resists dirt and hair and is easily removeable and machine washable Naturally hypoallergenic and resistant to dust mites, plus 3 year U.S. warranty - Medium size: 34" x 22" x 4"; Ideal for dogs up to 50 lbs