The Skimmer Eco Dry Rope is Edelrid's thinnest, lightest climbing rope for ice and mixed climbs. It's certified as a half and twin rope, and its 7. 1mm diameter is ideal for experienced belayers who want more space in their packs and less weight on the approach. Edelrid's Eco Dry finish is one of the first Dry treatments to excel UIAA's standards for limited water absorption without using harmful PFC chemicals that harm the environment we all love to climb in.