Rocklight rope is part of the Edelweiss Essential Line, a range of ropes developed for top performance at a bargain price. Rocklight is 9.8mm in diameter to excel in sport climbing and when weight savings is important. The Essential line of ropes delivers impressive stats that beat the competition with a low impact force of 8.1kN. Weight: 61 g/m. Impact force: 8.1kN. UIAA falls: 6. Mid Rope Indicator. PFAS-free. CE and UIAA Certified – Single Rope.