This new improved model of the karlie orthobed makes a wonderfully comfortable mattress for your dog the core of the bed is made of memory foam which gives your dog a soft and relaxing surface to lie on protects your dogs spine and joints and helps it to have a relaxing pain free sleep orthopaedic memory foam mattresses adapt to the dogs body temperature and stay warm for extra comfort the unique material spreads the dogs weight across the whole mattress surface and once your dog gets