With a diameter that bridges the gap between traditional ropes and new-school skinny ropes, the Beal Flyer II 10. 2mm Rope gives you versatile performance that's just as useful at the sport crag as it is on an alpine ice route. Beal's Golden Dry treatment adds a protective coating to both the core and the sheath to avoid water absorption and freezing on ice or alpine climbs, and slows down wear and tear, drastically increasing the rope's life expectancy.