Innovative hybrid frames are constructed from a rigid composite over-injected with a high performance fiber reinforced polymer which provides optimal structural integrity and support while being ultra-lightweight and adaptive. Slim ergonomic design for riding comfort during dynamic movement. Extremely stable slim-design four-point hinge system perfectly follows the articulation of the knee. Hinge system incorporates easily exchangeable extension stops (0, 10, & 20 degrees) which reduce the risk of sustaining injuries to: The medial and lateral collateral ligament The anterior and posterior cruciate ligament The lateral and medial meniscus Lightweight and highly ventilated knee-cup system offers strong impact force dispersion and absorption while ensuring maximum coverage area in all riding positions.