Knee Brace Z-FrameFor a medically certified knee brace that wont break the bank, look no further than the Z Frame. The injected composite chassis and aluminum hinge covers provide rigidity, reducing forces to limit knee injuries. Slim hinges give you superior bike feel, and a comfortable, easy fitting, low profile strap system makes it easy to put the Z Frame Hybrid on. The low profile shin bone plate fits perfectly inside your riding boots.