Weighing in at only 48g 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.