The Mammut 9.5 Crag Classic Duodess Rope is a single rope for indoor and outdoor climbing. At 9.5 mm, it's lightweight and durable for trad routes and having a great time at the gym and in the mountains. It's center-marked so you know right where you're at, plus tangle-free packed, allowing you to climb as soon as you get it. Climb safely and confidently every time with a rope you can trust.