Edelweiss set out to refine climbing gear performance standards with the Curve ARC 9. 8mm Climbing Rope. Tie in below your project with confidence knowing that the Curve's low impact force rating of just 7. 8 kN and dynamic elongation of nearly 40% means you'll enjoy a soft fall if gravity winds up getting the best of you. If not, then you'll dance your way up that face without feeling bogged down thanks to its narrow 9. 8-millimeter diameter and low rope weight of just 61 grams per meter.