Weighing in at only 48 g per meter, the Opera 8.5 is the first sub 50g rope and is the lightest and thinnest single rope on the market.It is also rated as a double and twin rope.The rope is made with technology that combines all of Beal's know-how, resulting in low impact forces, UNICORE technology, DRY COVER protection and the UIAA Water Repellent standard for the GOLDEN DRY version.This ultra-supple, ultralight rope will please the most demanding sport climbers while remaining versatile for mountaineering.Warning:Used as single rope, this is not a rope to put in all hands, or in all belaying devices: Its thinness makes it a rope which absolutely demands an expert belayer. In effect, traditional belay devices will offer reduced braking, and some automatic belay devices may not work at all.