Knee Brace X-FrameThe X Frame Pro Carbon is a medically certified knee brace. It is made of injected carbon composite, and is the top level dual hinged knee brace in the Leatt range, reducing forces to limit knee injuries. The slimmer inner hinge provides superior bike feel, while the metal geared outer hinge offers precise movement and durability. A numbered strapping system makes it easy to put the X Frame Pro Carbon on, and the comfortable, low profile shin bone