With a compact low-profile design offering superior levels of performance, the Supertech RK-10 Knee Brace has been engineered to provide the highest level of knee support. The RK-10 is ultra-lightweight, ultra-breathable, ultra-comfortable, & ultra-protective, & features a free-floating Nucleon PLASMA knee protector encased in an innovative asymmetric forged carbon fiber frame construction for the highest levels of rigidity & superior weight saving properties. Features: Carbon fiber frame is engineered for the optimal balance of flexibility & rigidity to deliver the highest levels of rider comfort & support Frame geometry was formulated using 3D scans of professional athletes to ensure the optimal internal volume & precise hinge width for maximum comfort during use. The upper & lower frames feature an innovative soft and flexible construction with a smooth transition to prevent the hard edges of the carbon frame from coming into direct contact with the skin The replaceable knee cups are constructed with a polyurethane outer shell backed with a Nucleon PLASMA Knee protector for the optimum blend of impact protection, flexibility, & scratch resistance The strategically positioned upper & lower patella extensions ensure maximum coverage regardless of the flexion angles The extremely stable, compact low-profile four-point hinge system perfectly follows the articulation of the knee while the extension stops, which are available in a range from 0 to 30 degrees, assist in setting the brace to the desired maximum opening angle The replaceable hinge covers transition smoothly from the hinges to the frame, effectively eliminating any any possibility of material snagging Nucleon PLASMA is a viscoelastic material engineered from bio-based polymers & formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies. Lightweight & highly ventilated