Injected Carbon Composite Frame; Asymmetrical Hinges: 40% slimmer inner hinge for superior bike feel and Metal geared outer hinge for precise movement and durability; Reduction of forces to limit knee injuries: ACL, Meniscus and MCL; Low-profile shin bone pad that fits inside all boots; Comfortable and easy fitting strap system; Customized fit with interchangeable hinge padding sizes; Certified as medical device: EU CA014741 and USA FDA 10048761; CE tested and certified as impact protection: Knee EN1621-1; Hyper extension limitations 5 deg, 10 deg, 15 deg and 20 deg for ACL injury reduction