Arc'teryx R300 Harness

Priced: $148.95 - $149.00 Rated:   - 5 stars out of 5 by 17 reviews.
Arc'teryx R300 Harness
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Arc'teryx R300 Harness -
Just because a harness is light, doesn’t mean it can’t provide insane comfort and functionality. The Arc’teryx R300 Harness gives you everything you want when dangling from the side of a massive rock. It utilizes a wider swami belt that features Warp Strength Technology to ensure that you are nothing but comfortable while securely strapped in. The WST load is uniformly supported throughout the entire harness. A snug fit is guaranteed with the Sure Fit leg loops, which have been enhanced with elasticity. Four gear loops give you plenty of places to hang everything you need during your ascent. The self-locking buckle makes sure that the only place you are going is up. After a long life of use, wear safety markers are built in to appear on the belay loop and tie-in areas so you know when it’s time to snag another R300. All climbers will, not just appreciate, but celebrate the way Arc’teryx has been able to blend comfort and utility into the R300 Harness.


  • 7075-T6 aluminum anodized buckles, Burly Double Weave four way stretch fabric, type nylon 6,6 webbing, polyurethane gear loops, Spacermesh
  • Exterior stretch-woven fabric is lightweight and highly abrasion resistant; spacermesh on inner face is soft and breathable


  • Ovalized leg loops offer an ergonomic fit, while two drop seat buckles let you take care of business when nature calls
  • Stretchy leg loops offer a precise fit without restricting range of motion
  • Ovalized WST leg loops with Sure-Fit LT elasticized connectors to accommodate a wide range of leg sizes


  • WST eliminates the need for excessive padding by uniformly spreading the load across the entire harness

Support and Cushioning:

  • Warp Strength® Technology (WST) allows the harness to be shaped and contoured to the climber's body for excellent support and comfort
  • Supportive Warp Strength technology (WST) swami belt supports load across entire harness structure

Weather and Wind:

  • Shaped for forward racking, polyurethane gear loops are reversible and removable; loops remain flexible in extreme cold


  • Core of tie-in points and belay loop feature Wear Safety Markers; when the sheath is worn, bright orange will show to indicate that abrasion to structural webbing may occur
  • 4 webbing loops sewn directly to harness are sheathed by injection-molded polyurethane gear loops


  • Self-locking 7075 T6 aluminum buckle at the waist provides an extra margin of safety by allowing adjustments while maintaining the proper double-back configuration
  • Non-structural haul loop lets you trail a second rope
  • Ovalized WST leg loops, improved tie-in point
  • Warp Strength Technology helps spread weight across the full harness structure for even and minimal loading
  • Wear safety markers on belay loop and tie-in points, self-locking buckle and stretchy mesh storage bag
  • Four gear loops and non-structural haul loop accommodate your pro and other essentials
  • The Arc'teryx R300 climbing harness comes with a stretchy mesh storage bag

The Arcteryx R-300 Harness. The R300 offers sport and trad climbers the ideal combination of lightness, suppleness and support. A wider swami utilizes Warp Strength technology (WST) for greater support without adding weight. Beefier tie-in point adds more strength to a critical area of the harness. WST leg loops have Sure Fit elastic connectors to fit a variety of leg sizes, and are patterned with a new conical shape for greater comfort while hanging. Four gear loops and a haul loop make racking-up for multipitch routes simple.

FEATURES of the Arcteryx R300 Harness.
SPECIFICATIONS of the Arcteryx R300 Harness.


Combining lightness, suppleness and support, the Arc'teryx R300 climbing harness is well suited for alpine climbing and trad climbing.

Weight (see spec chart) based on size Medium.Size ranges are guidelines only and will vary with the type of clothing worn during measurement. Harnesses fit differently on different individuals even when measurements are the same. Sizes are based on actual body dimensions.

Arc'teryx proves with the R300 harness that light weight doesn't have to equal a lack of support. To set this harness apart from the rest, Arc'teryx abandoned traditional design and used Wrap Strength Technology construction to shave ounces while ensuring excellent support at all but the longest hanging belays.

Mountain Gear
The functional, lightweight R300 Harness from ARCTERYX is perfect for exploring the world of rock climbing and mountaineering.
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Review RatingNumber of Reviews
Adjustable leg loops:31 - 34.5 inches
Belay loop:Climbing
Droppable leg loops:34 - 38 inches
Fits waist:Climbing
Gear Loop:yes
Gear loops:Climbing
Harness Class:Rock Climbing
Harness Gender:Mens
Haul Loop:yes
Leg loop size:26.5 - 29.5 inches
Material:7075 T6 aluminum anodized buckles, Burly Double Weave four way stretch fabric, Type 66 nylon webbing, Polyurethane gear loops, Spacermesh
Materials:7075 T6 aluminum anodized buckle, Burly™ Double Weave four-way stretch fabric, Vapor Mesh, Type 66 nylon webbing, Polyurethane gear loops, Spacermesh
Padded leg loops:28.5 - 31.5 inches
Padded waist:Climbing
Weight:310 g / 10.9 oz
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Arc'teryx R300 Harness Reviews:

Positive Reviews:

quite the harness

This harness is slick. if there was one thing that i did not like about the R-320, the harness that this is replacing it was the size of the waist belt. It was narrow and felt like it could cut you in half during a big fall. problem solved. this one is nice and thick, and very comfortable to fall in. However, like all harnesses by Arc'teryx it is not fun to hang in. something about how the webbing ends in a edge on the top and bottom really is not so great for hanging belays. additionally the loop that holds the webbing from the waist-belt, seems like a pedantic afterthought, it does its job miserably. instead of keeping out of the way and securely nestled by the waist-belt, it allows it to merely hang flaccidly near my racked gear. still not a huge concern but with that much money involved, i expect perfection. my main concern is the "Haul Loop" in the back which, is quite frankly ridiculous and non-functional for anything more than chalk bag duty.

but its still super COOL and you should by it so you can shave those grams of that are keeping you from red-pointing your Project Brah...
Pullzilla the Bulkasaurous Flex at REI on 04/04/2011

The Best Harness on the Market

This is the best harness on the market for outdoor sport climbing and indoor competition climbing. It's very comfortable for weighing only 300 grams. Since it's designed for hard red pointing, it doesn't need a full strength haul loop, and that's why it does not have one.
If you want a full strength haul loop, you should look somewhere else, I suggest a Black Diamond or Metolius harness. It's also not designed for multi-pitch climbing, where you are sitting in your harness all day. If you want a big wall harness, again, buy a Black Diamond or Metolius harness.
I especially like how form fitting it is. I can move without worrying about my harness getting in my way. The only down side is the price tag. It cost twice as much as the other high end harnesses on the market. However, if you want to climb the perfect 5.14 that you've been dreaming of, then this is the only harness you should use.
Ice Flower at REI on 08/08/2011

Arcteryx has done it again with an amazing design. In the last year we've seen a lot of harnesses appear on the market with minimal padding. Of these, I've found the R300 to be one of the most comfortable. However, the truth behind the matter is that with a lack of padding - or no padding in the case of the R300, comes some lack of comfort. Having experienced several hanging belays in the harness, I'd say that the harness is adequate, but not nearly as comfortable as more padded harnesses I've worn. the most comfortable harness I've worn for such belays is the Petzl Calidris. After 15 minutes or more in the R300 you will definitely be aware of it's presence. the wide Belt and leg loops do a good job of spreading out pressure zones, but even my first bod harness 20 years ago was more comfortable. While climbing you won't even know you're wearing this however...

Patrick Mulligan at on 02/09/2012

I was a bit skeptical on the support and comfort level when first seeing the design and minimalism of this harness; but my doubts were shattered once I understood how they were made and felt how they fit. The 'Warp Strength' design is unique and superior to other harness designs, essentially cradling your legs and evenly distributing force the same way a loungy hammock would. This thing is super light yet super strong. I barely felt like I had anything on and imagine a lengthy belay would prove more comfortable in this harness than most: especially when belaying on the 3rd pitch of a 5 pitch climb. If you plan on spending most of your spring/summer/fall on a rock or in a gym, get one, you won't be disappointed.

Jesse Howerton at on 05/11/2011

Super comfortable harness. When hanging the pressure is distributed evenly across the harness, making it super comfortable. I am 6'3" with a 34" waist and I have a large. Probably could squeeze into a medium, but the large is not "too" large. As I said, there are zero uncomfortable/restricting pressure points ANYWHERE when worn properly. Very lightweight and hardly noticeable when climbing. It's had a long life so far and the wear-warning marks arent anywhere near showing. This is a highest quality harness and is well worth the extra money vs. what you would spend on a budget harness. Would recommend to anyone!

Tighe Cordry at on 01/24/2012

This harness is great. Truthfully I have yet to have a chance to try it in the field but I am very impressed so far. When I first put the harness on I was impressed by how snug everything stayed around my body. Harness companies are always touting their new harnesses as "so comfortable you'll forget you're wearing it." this is the first time I've ever actually thought that. the warp-strength technology really enables them to make a harness that lies flat, I can only imagine how comfortable it would make this harness for a day of ski-touring or all-day cragging.

Casey Glaubman at on 05/10/2011

This thing is incredibly light and comfortable. As a smaller male, harnesses can feel really bulky on me, but this one hardly feels like it's there. I didn't realize how thin the back padding was, but the suspension system pulls in all the right places and hanging for long periods of time didn't bother me. My thighs are pretty thin and the leg loops seemed incredibly small at first, but they aren't a problem.
As per usual, the top-tier price comes with top-tier quality from Arc'teryx and I have no remorse spending a few dollars extra on this harness.

Nathan Bartholomew at on 10/01/2013

Great Harness. Have had it for about 3 months now. Very very comfortable weight distribution, even on long belays. Came from an older version of the Petzl Hirundos which was great, but this R300 is almost just as light (exactly the same I believe?), and much more comfortable in my opinion. Had a large in the Petzl and tried a Medium in the R300 as the Petzl was a little loose. Had to return it for a large, which cinches down much nicer than the petzl. I'm 6'1" and 180 pounds.

Blair Barney at on 06/13/2012

Don't expect the performance of a fully padded harness from this one. Having said that, the R300 is incredibly comfortable for a lightweight. The gear loops are bit of a compromise since they lack the rigidity of solid plastic loops found on typical rock harnesses. It took several leading sessions for me to develop enough dexterity to pluck gear quickly from the loops. Overall a great light-weight, low-bulk piece of gear.

chernivtsy1536178 at on 02/28/2012

This harness rocks. Very light, Very comfy, all wrapped up in a great design. The gear loops were great, supportive, and held a bunch of gear.
The only downside i noticed is the leg loops don't fit snug on my legs, they kind of flare out when the harness is not loaded. I noticed this visually, not physically, so it did not effect how the harness performed, or the comfort level.

mtbphoto1321629 at on 05/25/2011

Negative Reviews:

Suuper sweet looking but not comfortable

When I got this harness I was amazed at how small it packed (about two tube socks rolled up). The innovation in the design and materials used were up to the Arcteryx standard.

I put it on, it was light and non bulky. I clipped into at carabiner and rope that was hung from the ceiling... NOOO BUENO. This harness gently cut into my back and the bottom of my rib cage. Even when I pushed the harness down a little, it was still very uncomfortable.

I returned it and got a different brand with more padding and saved $90.
aastigger at REI on 07/07/2011

Neutral Reviews:

I absolutely loved my burngundy and grey R320 that I wore for the better part of a year of full-time climbing until I ground the waistbelt down to the orange warning fabric on a lovely 35 meter sandstone flare. That old R320 saw me through many routes and pitches, carrying Bugaboo alpine racks, Indian Creek racks, grade IV Valley racks with comfort and support.
When I wore that old friend down, I immediately purchased the new R300 (orange and grey) and noticed that the leg loops were a bit tighter but no big deal, right? It didn't take long to find that the new model didn't quite offer the support of the old version. The support for gear loops (a seam along the length of the waistbelt) has been redesigned. The old model had a seam that was straight across the waistbelt, and the new seam is contoured. On my body, with a Creek rack, the new R320 creases along the seam and is subsequently much less supportive at hanging belays than the old model. The difference was so dramatic that I had to retire the R300 after a couple of months because I couldn't get used to the discomfort. Once the waistbelt had creased, the crease became permanent.
I still have my old R320 and checked the waistbelt to make sure I wasn't hallucinating, and indeed the old harness has a completely intact and uncreased waistband after 10 months of hard use, whereas the newer R300 is creased after only a couple months of climbing.

Arrigetch at on 06/24/2012

i found this harness on sale and had heard great things, so i gave it a try. it really is a nice harness. it's very light, easily packable and distributes weight evenly.
however, the gear loops have come apart on me a couple times. they're easy enough to put back together, but it's annoying. a sterotypical looking climber would be happy with these leg loops. i have pretty big thighs though, and the initial stretch/break-in period was annoying. but the loops fit fine now, and i even wore them ice climbing. i would prefer an adjustable leg loop though. finally, the material of this harness can get a bit toasty during muggy climbing sessions. i'd be interested trying one of their other harness that has mesh material on the legs.

Chris Huntley at on 06/12/2013