Out of all the climbing ropes Mammut makes for alpine climbing, the Alpine Dry Rope is the thickest, burliest option that still packs small and doesn't weigh you down on long approaches. Its 9.5mm diameter has the same feel and specs as most skinnier sport climbing ropes, and it has a Dry treated sheath and core for UIAA-certified water absorption that excels in alpine environments. The Dry treatment also enhances abrasion-resistance for an equally convenient performance on rock and ice.