Ideal for osteoarthritis, moderate to severe meniscus compartment injuries and moderate to severe joint pain.The GenuTrain OA provides immediate and lasting relief from arthritic pain in the knee, even in chronic and severe cases. It unloads the medial or lateral compartment to create instant relief by minimizing joint contact. Lightweight and easy to put on and off, it's perfect for all day wear, support while you exercise or just relaxing at home. The GenuTrain OA is ideal for moderate to severe arthritis, repeated meniscus injuries and joint pain. With the BOA tension system you have complete control over how much you unload the joint, down to the millimeter. As instant pain relief on the go, it's an arthritic knee's best friend. Key Features Ideal for Moderate medial/lateral osteoarthritis Moderate knee instability Meniscus lesions/tears Bone bruising How To Achieve The Perfect Fit Step 1 Click the Which Size Fits Me button above. Measure the circumference of your leg 17 cm above the centre of your knee with your knee bent at 30 degrees. Step 2 Measure the circumference of your leg 15 cm below the centre of your knee with your knee bent at 30 degrees.