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The Arc'teryx X350a Climbing Harness features adjustable leg loops, ice clipper slots, and other goodies to take on anything from sport to ice climbing. And it weights only 12.3oz. The key to the X350a Climbing Harness's low weight and incredibly low-profile design comes from newly created Warp Strength Technology, which uses a specially woven fabric instead of traditional padded webbing. To round out the features, Arc'teryx added four gear loops to carry a big alpine rack, and the rubber molding can be removed to create a low profile for increased comfort when you climb with a pack. *Only available for US shipment.

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Does not last

  • Familiarity: I've put it through the wringer

very light harness and packs down to nothing.

Unfortunately to reach this low weight Arcteryx has trimmed down too much the belay loop. The belay loop wears out very quickly. This harness last half of other harnesses.

Love it! Favorite harness...

    I'm a 110 lb 5'2'' woman and this harness fits me on the tightest setting. Even though it is not a woman's harness, it fits much better than the R280 and is incredibly versatile. It has a very solid, yet lightweight feel about it. I highly recommend it.

    light and comfortable

      I spend a lot of time on a BDEL Chaos and while the padding in the BDEL make it extremely comfortable you can' treat this harness for lightweight and its resistance to soaking up moisture. Especially nice when you have thicker warming layers on but certainly still a good harness even in the summer months. It is and has been for many years my go to ice, alpine, and back country skiing harness.


        For those looking for a comfortable harness for sport, apline, ice, trad ... anything ... look no further.

        My only complaints are that the leg loops to require re-cinching occasionally and the back "haul-loop" / chalk bag hanger could be beefier with a real belay loop.

        Packs to nothing. Feels like nothing. After buying, your wallet will have nothing.

        Great Harness

          It really doesn't look like it but this harness is very comfortable to hang in. Great for those long approach alpine and ice routes that you'll expect to spend time weighting a harness. Also great for rock climbing and projecting. Plenty of gear loops to haul your crap. Adjustable leg loops make this harness awesome for alpine ascents as it will fit a variety of layering options. Light weight and pretty packable make this harness a good choice when weight and space are issues.

          For fit purposes, I have a 33in waist and the medium fit me close in cragging clothes, so I sized up to the large. It's almost too big in cragging clothes, but works well with layers; so size accordingly to your activities.

          I've used this for rock climbing (trad and sport), glacier traversing and general mountaineering and it's excelled in all of these situations. Spending the extra money is worth it if weight, space and comfort are factors for you.


            Best harness i have ever used except:

            I'm supposed to trust that little plastic d-ring with my haul line, or my climbing boots? Its rated to 35 pounds, but what hapens when the line is wet and frozen and snags in a crack while i'm cruxing out on some pitch the second day of some alpine line in freezing temps? No, i can't just stand up and crank it free, because IT JUST MIGHT BREAK!


            Some designer at ArcTeryx consciously made the decision to save a few cents and not put a full strength haul loop on this harness.

            If this was a budget harness i could understand this, but the fact of the matter is that this harness costs double to triple anything else out there!

            Arc Teryx... You suck! AAAAAAAHHHHHHHH!

            Ok I feel Better now.. Sorry

            Almost perfect...

              Great general alpine harness assuming that you value lightweight and packability but need a comfortable harness for technical climbing too. Bought mine in 2008 and like it except you cannot unhook the leg-loop suspenders easily for a call of nature. Also I bought a size larger to fit down pants and multiple layers, figuring I could just cinch it down, but I have found it hard to keep the legs and waist tight for very long, with the buckles seems a pain to have to tie them bad I guess.

              Almost perfect...

              Sick harness

                i bought it more as a novelty and figured I'd still use my BD and Petzl harnesses for climbing...but I was wrong...this always gets packed into my gear bag when readying and i love'll forget you have it on until you fall...

                Hey Arc'teryx, make the gear loops more rigid (stick out) like BD's Chaos please. Only folly of the harness, but other benefits outweigh even when trying to clip/unclip a piece of gear from one of the loops. Even in OWs a flatter gear loop isn't a massive advantage...

                Plush Minimalism

                  I've been climbing in the X350a all summer, and I love it. No more having to double check that I'm doubled back thanks to the new buckle system. Hanging in the harness is quite comfortable too. (Not that I ever "take" or anything....) Draws and gear hang where I need them to and it fits like a glove. I wear size 30 carharts, and I went with the small. There's still plenty of room in the harness should I need to layer up in the fall or winter. This is my go to harness when there is a fall potential. When ski-mountaineering, or for a just in case harness, check out the Camp Alp 95:


                  Tiny, comfy, practical

                    So far I'm completely happy with this harness, with no expectations of future disappointment. I do a lot of sport climbing currently and I've never been able to hold more draws on a single gear loop. put it on and forget. for me the adjustable leg loops were a must. I bought the 320 but the leg loops were entirely too small at the mediums size. so upgraded to this. definitely recommend it for any sport/trab/ice climbing

                    best harness out there

                      Not even a contest, the best harness on the market. Amazingly comfortably even at hanging belays and so light you tend to forget it's on. Packs down super small and the buckles are quick to adjust and bomber. Reversible gear loops and ice clippers are perfect. Only two small complaints. First, the haul loop is pretty weak but just slide an open loop of dyneema around the waist and you're set. Secondly, the drop seat is impossible to use so I switched the little Arcteryx buckle with one from a Mammut harness and its perfect. As far a sizing goes, need to try it on or be able to return it. I'm 140lb and 31in waist and got a Med. The leg loops are perfect but the waist is just barely small enough to fit. Pricey, but you get what you pay for!

                      Comfort and packable

                        This Harness is amazing. I am not the biggest fan as far as for trad climbing, or big wall, only because it dosent hold all my gear as well, and i have to majorly shoulder strap it up. But I can not say how perfect it is for everything else. I love the comfort when I am belaying my beginner friends, I can teach climbing all day with no complaints in this baby!
                        And then climbing in it is magical. I climb faster and longer all b/c of this harness.
                        I would def recommend it!

                        light and comfy

                          the harness is wicked comfortable, despite the lack of padding. love the light weight and packability. had to exchange for a different size, as it ran a bit small (i have a 30 waist, and the medium was too small). only problem i have was when stepping up to the large size, the leg loops aren't as tight as i would like them to be. should be great with ice. BTW, BD ice clippers fit the harness perfectly. thanks backcountry. as usual, customer service was excellent.

                          arcteryx website shows the arcteryx x350a...

                          arcteryx website shows the arcteryx x350a harness as having a Haul Loop.

                          bc dot com, please verify and update Tech Specs accordingly.

                          Can anyone tell me where the ice clipper...

                          Can anyone tell me where the ice clipper slots are located and how functional they are? That is my major concern with this harness. BD's Xenos has 6 slots and seem to be very well placed, but this harness is lighter. I have the R320 and really like how they are constructed, just trying to make sure the ice clippers are in the right places.

                          On your right side they're exactly where you'd want them - one slightly ahead of your hip and one slightly behind. The left side is missing the front slot (due to the buckle location), which is slightly annoying if you like to clip your tools up front for raps and belays. But the rear slot is where you'd want it, symmetric with the right side.

                          Undecided between this harness and the BD...

                          Undecided between this harness and the BD Xenos harness. I am into trad climbing and want a harness that is comfortable, safe, and lasts in time (considering the price of these two harnesses).
                          I tried on the Arc'Teryx harness here in a store and it is extremely comfortable, but I have some doubts because it seems so 'delicate'. Is it UIAA certified? I also tried on the BD Xenos which is just as comfortable, however it is bulkier. Someone please help me on deciding between the two.

                          Best Answer

                          I've worn both the light, sporty varieties and the all-day varieties of BD's most recent line and Arc'teryx's hyperthin harnesses and I prefer the BD ones. They feel a little more substantial and I also found them more comfortable in hard falls and long hangs (consecutive hanging rappels for instance). I would say that if you're into all-day trad climbing, the Xenos isn't really the harness best suited to your needs though. That's more of an ice climbing harness, and has BD's ice screw clips on it for just such occasions. The Chaos is the best BD harness for all-day, trad-climbing trips, and I've been loving it for months now.

                          Will this work on Rainer, Elbrus and...

                          Will this work on Rainer, Elbrus and Denali?

                          one of the best characteristics of this Arc'teryx harnesses is that you don't notice you're wearing it. They don't obstruct leg movement or interfere with backpack belts, plus the weight and pack-ability makes them ideal when space is at a premium. Additionally, the face fabric is really tough and there is no exposed stitching on the belt and legs, which also contributes to a long life, both yours and the harness'.

                          does this have a haul loop? i can't tell...

                          does this have a haul loop? i can't tell from the picture.

                          Does it have ice clipper loops? Would it...

                          Does it have ice clipper loops? Would it be a good ice harness?