The Fox Racing Launch Pro MTB Knee Guard is designed to provide protection for your knees while riding. The knee guard is made of perforated neoprene for breathability and features silicone grippers behind the knee to keep the pad in place. The knee guard also has pre-curved ergonomic fit and elastic strapping top and bottom to keep the pad in place. The knee guard is available in sizes Small/Medium, which fits thighs between 14.5" - 16" and calves 13.5" - 15", and Large/X-Large, which fits thighs between 16" - 17.5" and calves 15" - 16.5".