The Cho-Pat Dual Action Knee Strap supports you above and below the knee to provide immediate relief from patellar tendonitis osteoarthritis Osgood Schlatter’s disease ITB syndrome jumper’s knee weak knees runner’s knee torn PCL or MCL and unilateral knee replacements. The Cho-Pat Dual Action Knee Strap offers pain relief and protection from knee degeneration and overuse syndromes. The patented Dual Action Knee Strap applies pressure upon the patellar tendon just below the kneecap to help stabilize and tighten the kneecap mechanism improving patellar tracking elevation while reducing the pain and discomfort from knee conditions. This pressure below the knee reduces knee displacement. The pressure above the knee reduces the force of the quad muscles on the knee and lessens the potential for knee misalignment. The Dual Action’s Dynamic Pain Diffusion absorbs and disperses the pain-causing forces on the knee to relieve stress and reduce inflammation for the support the kneecap needs. Its exclusive range of sizes ensures a better fit and maximum performance. For maximum performance properly measure to find the correct size. Measure the circumference of the leg at the mid-kneecap. Note: Opening on the inside for tubing for tubing to be removed for washing. If you’re between sizes (or you have a larger upper leg / thigh) we recommend that you order the larger size.