This bed offers dense foam which gives orthopaedic comfort, helping with arthritis and muscle pain. The denser foam also makes it easier for older dogs to get in and out of bed as the mattress won't sink down or sag like other lower-quality foam beds. Its premium foam provides superior orthopedic support, helping to relieve joint pain, muscle stiffness, and arthritis for maximum comfort. This high-quality foam also prevents sagging, providing your pet with long-lasting support and stability.