Medically Certified Mono-Hinge Protection Stiff chassis for maximum control and protection but still offering a comfortable fit designed to fit junior riders– that is the essence of the mono hinge C-Frame Junior Knee Brace! A premium medically certified knee protection, natural knee movement, and comfort in one knee brace. Lab-tested built-in fracture points cause the C-Frame chassis to break before you injure your shin or thigh bone. The C-Frame three-point force distribution greatly reduces forces to the knee, thereby limiting knee Injuries (ACL, Meniscus, and MCL) and makes it a vital piece of protective equipment. A great alternative knee brace with hinges both sides is the Z-Frame Junior. Stiff, mono-hinge frame with three-point force distribution Very low-profile inner knee for superior bike feel Reduction of forces to limit knee injuries: ACL, Meniscus and MCL Certified as medical device: EU CA014741 USA FDA 10048761 Hyper extension limitations 10, 15, 20 and 25º for ACL injury reduction Engineered lab tested built-in fracture points The C-Frame chassis is designed to break before the threshold for injuring: The shin bone (Tibia) and the thigh bone (Femur) Comfortable, low-profile shin bone plate with load distribution pad that fits inside all boots Sizing: Junior Plastic Free Recyclable Packaging 5017010130