Bauerfeind GenuTrain OA Knee Brace brand new never used retails for 1500 dollars. Asking g 900 or best offer. Was never even tried on as I got in for knee surgery, this is for the right knee I believe size 5 is a xl size adjustable. Targeted relief for painful areas on the inside or outside of the knee joint, allowing you to be active for longer and noticeably reduce pain. Indications for Use: Medial or lateral osteoarthritis of the knee Instability (mediolateral) Unicompartmental cartilage/bone lesion Condition after cartilage surgery and cartilage growth for necessary unilateral post-operative relief Following unilateral meniscal lesions Ahlback's disease (osteonecrosis) Osteochondrosis dissecans Bone bruising (bone edema of the medial condylus of the femur/tibial plateau) Innovative Design for an Active Approach To Treatment Higher Level of Acceptance Over A Longer Period of Time Pressure-free bending zone in the hollow of the knee Non-slip design Breathable 3D knitted mesh Flexible joint splint on the side without pain Lightweight Easy Handling Easy to put on and take off thansk to large fitting and removal loops and flexible knitted fabric Individually adjustable relief thanks to Boa Fit System Noticeable Relief for Pain on the Side of the Knee Relief stability system with three-point principle, surrounding bands, flexible joint splints