It's a sturdy type and too heavy for me. Only tried it on. Support for knee joints with posterior tibial displacement Main features: Aluminum offset joints on both sides to enhance lateral stability. Accurately supports four points with front support straps, fixed straps, and elastic straps. Strap layout allows for easy on and off without reaching behind the leg. Highly elastic material around the patella improves fit during flexion. This is a dedicated supporter for posterior cruciate ligament injuries, but it is recommended for preventing instability and strengthening the legs, and is effective in reducing pain caused by knee joint rheumatism. In addition, the lateral aluminum stays prevent wear and tear of the knee cartilage.