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DMM 8.0mm Couloir

8.0mm Couloir 50m Dry



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UIAA Dry treated, light, and with low impact forces, the Couloir is an ideal half rope for alpine and winter climbing. The handling characteristics are exceptional – supple and conforming, but with a reassuring firm feel to inspire confidence. The tightly woven sheath helps longevity and also keeps things smooth for belaying, abseiling and clipping.

Lightweight half and twin rope ideal for year round use in the mountains.
UIAA Dry treated for water repellence, improved life and less drag.
ThermoControl treatment for superb handling and stability.
Low impact force for soft catches on marginal gear.
Smooth sheath reduces drag and helps durability.

Retail price

US$ 181.69
Price is a static conversion from
£145.50 GBP
Award Image
Weight 43.0 g/m
4.739 lbs / 2150 g
Diameter (millimeters) 8.0 mm
Length (meters) 50 m
Rope Type Half/Twin 
UIAA Falls (Single / Half / Twin) ­0  / 7  / 25
Dynamic Elongation (Single / Half / Twin) 0.0 % / - / -
Static Elongation (Single / Half / Twin) 0.0 % / - / -
Impact Force (Single / Half / Twin) 0.00 kN / 6.60 kN / 10.20 kN
Dry Treatment Sheath­
Sheath Proportion (%) 34.0 %
Sheath Slippage (mm) ­
Type of Middle Mark None
Rope End Marker None
Certification ­

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Alpinist Gear Review rating 5/5

Time after time, the Couloirs softly caught our leader falls and were not worse for the wear. With the amount of intense use we put on these ropes in nine days, I was surprised that they held up as well as they did. Generally, I go through multiple ropes in a year. The ropes still look ready for another trip. In a few weeks, I'm taking them on a month-long expedition to climb granite monoliths in Alaska's Kitchatnas. Here "the wind blows [around the towers] like a whistling gun notch—worse than Patagonia," says Ben Erdmann, my climbing partner.

The UIAA equipment standard provides a baseline for equipment performance in a test lab under controlled conditions on new equipment. Although these test conditions are relevant to the conditions encountered climbing, conditions encountered at the crags and the condition of the equipment are equally important. This recommendation from the UIAA member federation The British Mountaineering Council (BMC) provides vital equipment information that is NOT explicitly addressed in the standard, particularly failure modes of the equipment and recommendations for the use, inspection, maintenance, and retirement of equipment.