The New Ultra-Cell 4.1 utilizing the patented 3-piece patella to accommodate the low profile when your knee is bent. This also allows the parts to be changed in the field, This brace features a strap closure system on the back and will continue to offer the Patented “Anti-rotation Tether” to secure the best protection of any brace. A.C.M. FRAME Anatomically correct design Carbon fiber epoxy matrix Rigid & lightweight, impact distributing structure ASYMMETRI-GLIDE HINGE Tracks the natural “rolling-gliding” motion of the knee joint Asymmetrical design allows each hinge to set properly Allows for automatic tibia alignment of lower frame Adjustable ext. regulator from 0º to 30º Condyle shims for fine tuning fit A.R.C. CUFF Adjustable Retention Control Multiform rigid lateral support Built in Anti-Rotation connection ANTI-ROTATION TETHER Links the brace to the boot, making them as one Transfers forces of a lower leg rotation Adjustable to suit each individual TELE-TRI PATELLA CUP Three piece design Easily removable High impact Nylon 6 material Full range of motion coverage of the knee cap Thermo-Formed EV50 shock absorbent foam padding WATER RESISTANT Non-corrosive metals Non-corrosive composites Hand washable soft materials STRAPS Our straps placed exactly where you want them, offering comfort and strap control. UNDER SLEEVES COTTON (included with braces) Cotton compression sleeves PROUDLY MADE IN AMERICA