Climbers and mountaineers who use it often return to buy more, which explains why the Mammut Flash is the most popular choice in the Swiss-made Mammut climbing rope collection. It's an ideal choice for outdoor cragging and gym wall work. Recommended for single rope climbing, and indoor wall use. Specs: Diameter: 10.5 mm Treatment: Standard Fall Rating: 10 Elongation: 6.0% Weight: 4.4 kg