The DynaTrack Plus Patella Stabilizer now contains medial and lateral plastic hinges which enhance the brace's ability to conform to the knee during flexion. With its patented buttress design, the DynaTrack Plus aids int he treatment of patellafemoral dysfunction. The buttress is lined with Skinloc™ materal and makes direct contact with the patella. The straps connected to the buttress allow you to easily adjust the level of tension. The anterior closure design allows for ease of application and optimum fit. A large popliteal opening permits a high degree of flexion with no discomfort. Bilateral design fits left or right knee. To size correctly, measure the circumference of the knee at mid patella. Neoprene version provides greater compression and warmth, while the CoolFlex version is breathable and lightweight for superior comfort.