Medical professionals, athletes and active adults have recommended and successfully used the original Cho Pat knee strap for reducing the pain caused by various knee disorders for over 30 years. The strap dynamically supports the knee as it bends and straightens. Applying appropriate pressure on the tendon below the knee cap, the original knee strap helps guide the knee cap in the groove, improving tracking and assisting in spreading pressure uniformly over the surface area. The Cho Pat original knee strap is available in multiple sizes for a more specific fit and more effective results. Measure around leg below kneecap.