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Couloir Harness

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Ultralight, and extremely packable, the Couloir is the harness of choice for mountaineers and skiers on steep snow climbs, short rappels and technical glacier travel. READ MORE
Item# BD651084ULBLM_L1


  • Color
    Ultra Blue
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Ultralight, and extremely packable, the Couloir is the harness of choice for mountaineers and skiers on steep snow climbs, short rappels and technical glacier travel. Learn More


For technical big mountain lines, crevassed ski terrain or moderate glacier climbs, the Black Diamond Couloir harness is a full-featured technical harness that packs down to the size of an orange and easily stashes in your pack or jacket pocket. Designed with a full-strength belay loop, the Couloir features low-profile comfort with a Speed buckle closure that makes for easy on and off while wearing skis or crampons. Two Ice Clipper slots pair with an integrated ice screw slot in each leg loop to reduce clanking during long approaches and flat glacier travel, and two webbing gear loops secure cordalettes, extra biners and other essential gear.

  • Redesigned ultralight construction with hydrophobic fabric
  • Speed buckle for easy on/off while wearing skis or crampons
  • Two webbing gear loops
  • Four Ice Clipper slots with ice screw slot in each leg loop to reduce clanking
  • Full-strength belay loop
  • Extremely light, packable and low profile
  • Primary fabric is bluesign approved

Tech Specs

Series :   Specialty
Weight :   215 g (7.5 oz)
Fusion Comfort Construction

Fusion Comfort Construction™

Intent on building a harness that would move with the body it protects, we designed a triple-weave webbing on the interior of the harness’s waistbelt that provides movement-focused technology while maintaining superior breathability, durability and strength. Also featured on the harness’s leg loops, this technology offers excellent load sharing, relieving pressure from sensitive points of contact.

Couloir Harness is rated 3.8 out of 5 by 17.
Rated 3 out of 5 by from need a few tweaks In practice this sort of harness doesn't really get "used" that much... It's mostly along for the ride on ski mountaineering trips for the just in case crevasse fall or short exposed roped ridge or gully step kicking. So it's main features should be that is light, compact and EASY to put on in winter conditions. I give it good marks for being light and compact, but it is a bear to thread and double back even without gloves on. The less experienced folks I was leading couldn't manage it at all, and forget it once the harness gets damp or icy. A larger easier to manage buckle would not add that much weight or bulk and would go a long way to faster, easier and less finger numbing transitions on a tour. Until the buckle is made more winter-user friendly I would not recommend this harness.
Date published: 2017-04-29
Rated 2 out of 5 by from Better choices exist Very light and adjustable, true. But to put on while wearing skis (one of the reasons one would buy this harness) requires threading the double-back buckle, which is barely possible with bare hands, and impossible with gloves. Furthermore, the gear loops are so small and tight to the harness as to be unusable, again especially with gloves (and this is supposed to be a harness designed for winter use!).
Date published: 2017-03-15
Rated 4 out of 5 by from Best harness for mountaineering (only) I bought this harness for mountaineering trips (only), is perfect very lightweight and good fit. For people who complain about difficulty peeing with the harness on is not true, the buckle on ether leg can be open very easy and the harness will shift almost by itself giving you the comfort for your necessities. Is correct if the buckle will be just slightly bigger this harness will be 5 stars. However since you adjust this only once on the beginning of your climbing ok may be twice I do not se such a big of a deal. I recommend this harnesses for mountaineering. The product is not designed for rock climbing or to spend significant amount of time on harness, is that's what you want go buy Petzel.
Date published: 2017-05-20
Rated 4 out of 5 by from Works OK, needs fine tuning I bought this immediately when it became available. The harness is very light, packs small and is a great companion on ski touring trips or for lighter mountaineering including shorter scrambles. The comfort is appropriate for this class of product (read "low but OK". Two downsides, though. The main belt is terribly difficult to pull through the buckle. Safety-wise this may sound like a good thing but tying the belt is uncomfortable, messy, requires both hands and a bit of acrobatics, too. Maybe when the belt and the buckle are older this will get better. The obvious omission is the size of the ice screws slots on the legloops. A standard Black Diamond screw - yes, your own - will not go through with the cap on, the loop is too small. Of course, when you ice climb, you remove the caps before racking up but this is no ice climbing harness, it's a touring harness. Everybody I know carries their screws WITH the caps when they ski-tour or cross glaciers and so on because you plan on NOT using the screws in the first place and there is no point in destroying your precious shells with the sharp end of the screw. How this was missed during the design phase I can't understand. Something to fix in the next generation.
Date published: 2017-03-14
Rated 3 out of 5 by from Built for Speed not Comfort...& BAD waist buckle! Got this harness for ski-mo, and it does everything I need it to. It's incredibly light and does compact down small enough to fit into a jacket pocket. That being said, you would NOT want to spend any time hanging in it as it feels like a tourniquet is being applied to your upper legs after anything more than a short rappel. Also, as many users have said, the waist buckle absolutely SUCKS! BD, you guys have to do something about this. It's hard to put on, hard to take off, hard to adjust, and really takes away from the overall quality. I could tell as soon as I tried it out in the shop without gloves that this would be a problem. I needed an ultralight harness so I got this one anyway, but that obnoxious buckle almost makes the whole thing not worth having!
Date published: 2018-01-30
Rated 1 out of 5 by from Waist buckle The worst waist buckle design I ever seen on climbing harness, even ancient old BD Alpine Bod had easier one to operate. Otherwise neat and pretty construction belt and leg loops, buckle was a deal breaker for me.
Date published: 2017-11-07
Rated 4 out of 5 by from Light and simple I've used this harness primarily for glacier travel and an alpine ice route. The four available ice clipper slots allow for some adjustability in which slots to set the ice clippers which was nice. The screw holder strap on the leg loop was nice and effective at keeping the ice screw from bouncing around on the leg during glacier travel (or would do the same for glaciated skiing) and fit a variety of screw diameters. The materials are lightweight and trim and the harness is overall lower profile than the previous generation, and thus is more comfortable under a pack. The gear loops are usable and large enough to carry a light alpine rack, and fully adequate to carry what you need. They are however small enough to not carry a double rack, but that's not what this harness is for... The only downside is the buckle. It's not exactly speedy, I've found I still need to feed the webbing through with both hands to get the harness to cinch down which is a problem if it's very cold and you're wearing gloves. Other than that the harness fits the bill well for alpine missions skiing or climbing.
Date published: 2017-06-10
Rated 3 out of 5 by from Not a huge fan.... Buckle is just a troublesome as old coulior buckle, super hard with gloves. Also hard to take off. Also there's no real way to deal with excess extra length on waist belt. Just flops around. That being said it's light and is comfortable under a pack.
Date published: 2017-07-29
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