Petzl got its Volta Dry Climbing Rope certified for use as a single, twin, or half rope so you can climb crags, ice, big walls, or mixed alpine routes with the same rope. The Volta sports a skinny 9. 2-millimeter diameter and an ultralight weight (55 grams per meter) to keep elite climbers content. Petzl treated this rope with a Duratec dry treatment to resist water, dirt, and abrasion, and the treatment also provides better rope grip and handling in cold, wet conditions. This rope also has an UltraSonic finish to bond the core and sheathe together in order to eliminate frayed ends and enhance the Volta's overall durability. Its middle mark will help you find the center of the rope for quicker descents, and the ClimbReady coil lets you uncoil this rope out of its bag without big tangles.