Edelweiss Onsight 9.9mm Climbing Rope. Of special interest where long runouts are involved and weight becomes critical. The On Sight is a great all-around rope with a great price. At 9.9mm the On Sight is perfect for those hard sport projects, light enough to pack in long distances, and beefy enough to take a beating. All On Sights are dry treated using the Edelweiss Everdry system. Colors may vary.