We learned a lot form developing our C-Frame and X-Frame knee braces, and we recognize the need for a cage type knee brace for junior riders.
Not as stiff as the C-Frame, but a good chassis made from glass-filled nylon for comfort and a Carbon Injected knee for that rigidity, which reduces the ACL, Meniscus and MCL injury risk. The Z-Frame is also CE certified as a medical device and impact protection.
Maybe it’s time to get rid of your knee protectors and get yourself a knee brace? A great alternative knee brace with a single sided hinge is the C-Frame Junior.