The Opera is an 8.5mm single rope that weighs 48 grams per meter. Its features make this rope the thinnest and lightest single rope on the market. The small diameter means that it can also be used as a double rope, in the mountains, on ice, or when trad climbing.The rope has a low impact force, uses Unicore technology (which bonds the core and the sheath together), and uses Dry Cover protection which means that it earns UIAA Water Repellent certification. This versatile rope is intended to be used as a single rope for high-end sport climbing or as double rope for mountaineering in any conditions. The manufacturer recommends verifying that your belay device is compatible with this rope given its thin diameter.