Osteoarthritis, like most orthopedic diseases, is a progressive disease that is associated with destruction of joint surfaces. Knee osteoarthritis can start at a young age and peak in middle age. Damage to the cartilaginous surface of the knee joint due to very high weight pressure or sudden blows to the knee causes the two bones involved in the knee joint to rub against each other and cause severe pain. The nerves in the bones are severely stimulated during each movement, and the pain becomes so severe that the person loses the ability to walk. But what is the solution? The use of medical knee braces designed for knee osteoarthritis is one of the most important ways to prevent the progression of osteoarthritis and eliminate the symptoms of knee pain. This knee brace should have features to be able to lift weight off the knee well and also prevent weakening of the knee and thigh muscles. In the following articles, we will describe the features of a medical knee brace.