The dual density pad anchors the spiral strap below the knee, this strap keeps the lower leg from rotating internally while maintaining proper alignment. Resin stays increase proprioception to keep the leg in a neutral position while ROM-Tech butterfly shape pattern on the backside of the brace assists in knee flexion and extension. The a-Fit technology allows an anatomically correct fit. While Flyweight design provides an ultra-thin, lightweight material for comfort. V-Tech flow through design allows ventilation while in motion.