FEATURES of the Zamst RK1 Knee Brace The dual density pad anchors the spiral strap below the knee that keeps the lower leg from rotating internally while maintaining proper alignment Resin stays increase proprioception to keep the leg in a neutral position Functional and biomechanical brace that corrects issues causing IT Band Syndrome a-Fit anatomically correct support for right or left knee Flyweight Tech advanced material fabrication with lightweight construction ROM-Tech pre-curved design provides full range of motion for maximized performance levels V-Tech ventilated flow through design quickly removes perspiration and keeps you cool while in motion