Introducing a new hybrid classic!Ultra-Cell 3.0 utilizing the patella Cup from The Carbon Cell Creating the Ultra-Cell 4.0. With pants getting smaller in the knee area and being elastic, plus the huge success of the Carbon Cell, we have used our collapsing, 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 and will continue to have the Ultra-Cell 3.0 Strap Positioning Liners (SPL). This brace will continue to offer the Patented "Anti-rotation Tether" to secure the best protection of any brace.KEY FEATURESA.C.M. FRAMEAnatomically correct design Carbon fiber epoxy matrix Rigid & lightweight, impact distributing structureASYMMETRI-GLIDE HINGETracks 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 0 to 30 Condyle shims for fine tuning fitA.R.C. CUFFAdjustable Retention Control Multiform rigid lateral support Built in Anti-Rotation connectionANTI-ROTATION TETHERLinks the brace to the boot, making them as one Transfers forces of a lower leg rotation Adjustable to suit each individualTELE-TRI PATELLA CUPThree piece design Easily removable High impact Nylon 6 material Full range of motion coverage of the knee cap Thermo-Formed EV50 shock absorbent foam paddingWATER RESISTANTNon-corrosive metals Non-corrosive composites Hand washable soft materials3.0 LinersOur liners are a low profile material which keeps the straps placed exactly where you want them, offering comfort and strap control.UNDER SLEEVES COTTON (included with braces)Cotton compression sleeves