The Agon Xtreme Kneelength Proback racing swimsuit is made of woven high density microfiber resulting in an extremely light racing swimsuit that provides excellent compression to reduce muscle vibration. The Agon Xtreme Kneelength Proback has a water repellent coating to limit water absorption. Agon's Xtreme Kneelength Proback is a technologically advanced kneelength racing swimsuit that is built for speed and will leave your competition without a chance.