The Edelweiss Curve Arc 9.8mm Rope is a single rope for Climbing lightweight. At the 9.8mm diameter, you'd better be a tried and True climber, as this isn't for beginners. Soft handling and fluid, you'll be sending up the rock in no time. Arc in the name means it's bi-pattern, so you know right when the changeover happens. Features of the Edelweiss Curve Arc 9.8mm Rope The Curve is fluid, light and Fit for climbers who want to progress to a Higher level