Reviews You Can Rely On

Black Diamond Chaos Review

A pricey harness that is comfortable but doesn’t optimize racking space
gearlab tested logo
black diamond chaos climbing harness review
Credit: Black Diamond
Price:  $125 List
  • 1
  • 2
  • 3
  • 4
  • 5
Manufacturer:   Black Diamond
By Andy Wellman ⋅ Senior Review Editor  ⋅  Oct 31, 2017
  • Hanging Comfort - 35% 5.0
  • Standing Comfort and Mobility - 20% 7.0
  • Features - 20% 8.0
  • Belaying Comfort - 15% 7.0
  • Versatility - 10% 6.0

Our Verdict

Black Diamond discontinued the Chaos harness as of 2020.
Comfortable design
Larger front gear loops are stiff and easy to clip
Less gear racking space than desired
No ice clipper slots
The Black Diamond Chaos is an excellent harness explicitly designed for trad cragging and long free routes. It uses Black Diamond's top of the line Kinetic Core Construction, which disperses the load in the waist using Vectran fibers instead of the strips of webbing used by nearly every other harness. Paired with fixed leg loops and slightly larger front gear loops, this harness is simple and durable and can hold more gear than other offerings by Black Diamond. However, the top of the line construction comes with a high-end cost of $125, and we aren't sure that there is any added performance to justify it costing double that of our Best Overall award winners. Never-the-less, the Chaos is a comfortable harness that works well for rock climbing.

Our Analysis and Test Results

Our takeaway from our time climbing in this harness is that it doesn't have as much gear storage as we would wish. This is a disappointing realization to have about a harness designed specifically to carry more gear. While we do recognize that the "oversized" front gear loops are ever so slightly bigger than either the rear gear loops or the standard gear loops found on both the BD Momentum and BD Solution, calling them oversized feels like an exaggeration. It takes busting out a tape measure to verify that they are indeed larger. We naturally found that both the Arc'teryx AR-395a and the Petzl Sama have significantly more available gear storage, and compared to the genuinely huge gear loops on the front of the Petzl Adjama, they aren't so large.

Performance Comparison

black diamond chaos climbing harness review - andrew hanging the draws at the techno crag while wearing the bd...
Andrew hanging the draws at the Techno Crag while wearing the BD Chaos harness, which he likes due to the integrated waist belt design and versatility for all styles of rock climbing.

Hanging Comfort

During our intensive side-by-side testing for hanging comfort, we came to the realization that while hanging about 50% of a climber's weight will be supported by the leg loops on their harness, and the waist belt will also hold about 50%. The BD Chaos has fixed leg loops paired with a band of elastic that keeps them snug around the legs. While hanging, we found them to be neither super comfortable or drastically uncomfortable. By comparison, the waist belt was nicely cushioned, and the breathable mesh backing felt good against our skin, but like most harnesses, hanging caused it to ride up a bit and put some pressure on our kidneys. Overall, this harness feels about as comfortable as the Black Diamond Momentum while hanging, but isn't nearly as comfortable as the most comfortable hanress for sport climbing, the Black Diamond Solution.

black diamond chaos climbing harness review - hanging out at the base of the crag in the bd chaos, we found that...
Hanging out at the base of the crag in the BD Chaos, we found that its leg loops were pretty comfy for hanging in, but not as much as the ultra wide leg loops found on the Solution.

Standing Comfort and Mobility

The Chaos is undoubtedly a comfy harness for merely chilling in. Like the Petzl Sama, its padded waist belt leaves one feeling that they can indeed notice the presence of the harness, but it fits snugly and comfortably. When carrying a massive rack, it is very comfortable, with very little noticeable pressure against the hips, or sag of the waist belt. Despite being padded, it is thinner than most padded harnesses, so it sits a bit better underneath a pack's hip belt than the Petzl Corax, for example, but still isn't as impressive for this purpose as the super thin AR-395a. And with its elasticized fixed leg loops, we felt like it became tighter and far more noticeable as we added layers of clothing on underneath it.

black diamond chaos climbing harness review - check out the fixed leg loops and corresponding elastic band that...
Check out the fixed leg loops and corresponding elastic band that helps keep them fitting snugly. These were great for climbing in, but slightly more present and noticable while hanging out and walking that other harnesses with adjustable leg loops.

From a strict mobility standpoint, the Chaos felt remarkably similar to the Sama, that is, less mobile than harnesses with adjustable leg loops. However, while this snugness is noticeable chilling on the ground, we didn't once find ourselves inhibited or annoyed while climbing. Once again, the Chaos received the same score for Standing Comfort and Mobility as the BD Momentum.


Overall, the features on this harness are not quite as numerous or as useful as those found on the Petzl Sama, and certainly not as versatile as those found on the Black Diamond Technician. We loved how easily the single auto-locking waist buckle was to snug up, and how securely tight it stays all day long. We also like how the gear loops are flat rigid plastic that is easy to clip and unclip from and don't cause the biners to bunch up in a low point. Likewise, the haul loop is easy to blindly clip, and we like that it is rated to 12kN for emergency use on a big route. Also worth mentioning is that the leg loops can be fully removed for more comfortable bivies on alpine rock routes.

black diamond chaos climbing harness review - as you can see, there is enough space on the gear loops of the chaos...
As you can see, there is enough space on the gear loops of the Chaos to hold an entire free rack, especially on the spacier front loop. However, things get a bit tight when adding shoes and water to this mix, and we wish there was a bit more space.

However, we found that while the "oversized" front gear loops are just big enough, the two rear ones are still quite small for use on long free routes, where we need plenty of space for clipping our shoes, water bottle, windbreaker, and emergency climbing gear like webbing and a knife. We couldn't help but notice how these loops were as small as the ones on the sport-specific BD Solution, and also how there are about two inches of unused space on each side of the haul loop. That means that at least four inches of potential harness space is unused on a harness without enough racking space. Enlarging these two back loops would be great, but making all four larger would be even better! Also worth noting is that this harness does not have ice clipper slots for use in the winter or on mixed alpine climbs.

Belaying Comfort

When it comes to belaying for long periods of time, most of the weight of your partner will be focused on the leg loops where they wrap around the inside of the leg. We found the Chaos to be about average in this department. The leg loops weren't super comfortable but were not nearly as painful as we experienced while belaying in the AR-395a or the Edelrid Zack. The waist belt stayed comfortably in place, so this harness ended up being a bit more comfortable than the Momentum for belaying.

black diamond chaos climbing harness review - andrew lead belaying at a hanging belay on a precarious slab. the...
Andrew lead belaying at a hanging belay on a precarious slab. The Chaos was pretty comfortable for both belaying and hanging, although not as comfy as the Solution.


With fixed leg loops rather than adjustable ones and no ice clipper slots, the Chaos is not quite as versatile as the Petzl Aquila, and nowhere near as versatile as the Petzl Sitta. Despite our complaints about the size of the gear loops, it is a good choice for most rock climbing adventures, big or small, we just think it would work a lot better with larger loops. If you only rock climb, mostly cragging, then this harness could be a "quiver of one."

black diamond chaos climbing harness review - while the chaos is designed for long free routes, we found that it...
While the Chaos is designed for long free routes, we found that it works equally as well for any sort of rock climbing, including single pitch sport climbs.

Best Applications

Despite being specifically designed for trad climbing, we think this harness is also optimally suited for both sport and gym climbing. It has plenty of gear racking space for single pitch trad cragging, and will work ok, but not perfect, for long free routes or alpine rock climbs. Due to its fixed leg loops, we wouldn't choose to use it for mountaineering, and it lacks the necessary ice clipper slots for ice or mixed alpine climbing.

black diamond chaos climbing harness review - while the chaos is designed with a bit of extra storage for long...
While the Chaos is designed with a bit of extra storage for long free routes, we found it to be optimal for sport climbing, as we are testing here on the Heinous Cling at Smith Rock.


This harness retails for $125, making it one of the most expensive harness in this review. That said, it costs significantly more than most of our award winners that performed better. While this is a great harness to own, we have a hard time seeing where the added value comes from with such a high price.


The Chaos is a high-end harness. For long free routes, we wish that it had more gear storage, and actually think that it is ideally suited for clipping bolts instead. While this is a comfortable harness that uses some advanced technology to distribute forces in the waist belt, it also comes at a high price that we aren't sure is completely warranted.

black diamond chaos climbing harness review - the chaos is an excellent high end harness that is comfortable for...
The Chaos is an excellent high end harness that is comfortable for all styles of rock climbing, as Andrew shows while testing it in Colorado.

Andy Wellman

Ad-free. Influence-free. Powered by Testing.

GearLab is founded on the principle of honest, objective, reviews. Our experts test thousands of products each year using thoughtful test plans that bring out key performance differences between competing products. And, to assure complete independence, we buy all the products we test ourselves. No cherry-picked units sent by manufacturers. No sponsored content. No ads. Just real, honest, side-by-side testing and comparison.

Learn More