The Thermoskin® Hinged Knee Brace provides excellent knee support and provides medial and lateral stability. The removable hinges and Velcro strapping combine to give comfortable, convenient, user adjustable support for normal daily activities and exercise. All hinges give medial and lateral support, and the Single Pivot Hinge provides a hyperextension stop at zero degrees; the Dual Pivot Hinge affords functional mobility and support for ligament/mensicus postoperative rehabilitation; and the Range of Motion hinge controls extension/flexion from 0-45 degrees in 15 degree increments. The Thermoskin lining retains just enough body heat to provide a therapeutic effect, while the technologically advanced fabric keeps your skin dry and comfortable during long term wear. Universally designed to fit the right and left legs. Order by Knee Circumference in inches (centimeters) measured around the knee just below the kneecap with the knee slightly bent.