This low-rebound mattress gently envelops senior dogs like a marshmallow, preventing bedsores. M size: Width 50cm, Depth 75cm, Thickness 7cm Used for just over a month. No cover. The Althea pressure-relieving mat has a two-layer structure: low-rebound urethane that gently sinks in, and high-rebound material to prevent excessive sinking. Even if the dog is bedridden and in the same position for a long time, it can relieve pressure and pain on protruding bones, allowing for comfortable sleep. The curved sides prevent the body from slipping off. Materials: Cover: Nylon, Filling: Urethane foam, Micell foam