Leatt has learned a lot from developing their C-Frame & X-Frame knee braces, & recognizes the need for a great knee brace that won t break the bank. Not as stiff as the C-Frame or X-Frame, but a good chassis made from glass-filled nylon for comfort & a Carbon Injected knee for that rigidity which reduces the ACL, Meniscus, & MCL injury risk. The Z-Frame is also certified as a medical device & as impact protection, maybe it s time to get rid of your knee protectors & get yourself a knee brace? Next step up is the X-Frame for a stiffer chassis & our top line cage type brace or the C-Frame Pro Carbon knee brace, if you are looking for a single sided hinge. Features Injected Composite chassis Slim hinges for superior bike feel Aluminium hinge covers for rigidity & endurance Reduction of forces to limit knee injuries: ACL, Meniscus & MCL Certified as medical device: EU CA014741, USA FDA 10048761 Tested & certified as impact protection: Knee EN1621-1 Hyper extension limit...