C-IV — Lightweight Low Stretch Technora Canyoneering Rope The C-IV is a very high performing 9mm rope designed specifically for the rigors of canyoneering. The tough Technora sheath resists abrasion and cutting, deflects the heat from rapid descents and is extremely low stretch. The polypropylene braided core is water resistant and helps the rope float. This core also helps to reduce weight, while the Technora sheath makes the rope strong. CanyonTech — Lightweight Technora Canyoneering Rope The 9.5mm CanyonTech was designed for aggressive canyoneering adventures. It features a 100% Technora sheath for enhanced durability, low stretch and cut resistance. Technora also has high heat resistance so it can better deflect the heat generated from rapid descents. The nylon core provides protection against impact and shock loading. The tight sheath design keeps out dirt and water, while giving the rope superb handling and added longevity. Canyon Tech is lightweight, and very strong.