Many middle-aged & elderly people, as well as those who play sport, suffer from cartilage degradation & damage to the soft tissue in the knee joint, resulting in joint pain & arthritis. The Walking Massage Knee Protector provides comfortable knee support & gentle massage & pain relief. Whether walking, cycling, generally exercising or at leisure, the Protector massages the inner knee, resulting in increased circulation which can aid recovery, reduce pain & prevent further deterioration. One size fits all.