Medically Certified Protection The all new X-Frame Hybrid Knee Brace is manufactured from Injected Carbon Composite and has a 40% slimmer hinge on the inside to provide superior bike feel, the outer hinge has metal gears for durable and precise movement.We use a separate sleeve with a CE certified impact protector built in to reduce the bulk in the knee area allowing freer movement when wearing race pants.A numbered strapping system for ease and different sized hinge pads are included with a low-profile shin plate all ensure the fit is perfect for you and above all comfortable.The X-Frame Hybrid Knee Brace is made of Injected Carbon Composite and is the top-level cage-type knee brace in our range. Engineered to help reduce injuries (ACL, Meniscus, and MCL), it is CE certified as a medical device and as impact protection.For our top line cage type brace, take a look at the X-Frame. An alternative would be our C-Frame Pro Carbon knee brace, if you are looking for a stiffer chassis and a single sided hinge, or for something more cost effective the Z-Frame is a great option. Features: Injected Carbon Composite FrameAsymmetrical Hinges40% slimmer inner hinge for superior bike feelMetal geared outer hinge for precise movement and durabilitySleeve includes Airflex Impact Gel knee cup with hard shell slider for ultimate knee brace comfortReduction of forces to limit knee injuries: ACL, Meniscus and MCLCertified as medical device: EU CA014741USA FDA 10048761CE tested and certified as impact protection: Knee EN1621-1Hyper extension limitations 5º, 10º, 15º and 20º for ACL injury reductionFixed hyper flexion stoppers for meniscus injury reductionLow-profile shin bone pad that fits inside all bootsComfortable and easy fitting strap systemCustomized fit with interchangeable hinge padding sizesSize: S-XXLKnee Brace Sleeves included