Features of the Mammut 9.5 Infinity Classic Rope Perfect combination of small diameter, low weight and High Performance Sheath proportion: 40% UIAA falls (single rope 80 kg): 7-8 Impact force: 8.4 kN Diameter: 9.5 mm UIAA dry test: 46% Stretch at 80 kg: 6.5% Stretch on first fall: 31%