The Thermoskin® Knee Stabilizer provides effective knee support and provides medial and lateral stability. The internal struts and Velcro strapping give comfortable, user adjustable support for normal daily activities and exercise. 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.