The Arlee Bella OrthoLux Orthopedic Paw Print Mattress Waterproof Dog Bed features a waterproof inner liner and high-density Ortholux foam filling to support joints and pressure points. It comes with a durable gray cover printed with paw prints, which is removable and machine washable. The thick orthopedic foam provides long-lasting comfort, and the waterproof design protects the bed from spills or accidents to keep it dry.