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Black Diamond Ozone Harness

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8 Reviews


Ultralight functionality to help you send successfully.

The minimalist Black Diamond Ozone Harness takes the weight off your waist so you can do some serious sport cragging comfortably. Its Kinetic Core Construction consists of a durable, abrasion-resistant nylon shell, a breathable 3D AirMesh lining, and strands of liquid crystal polymer in the center that evenly distribute your body's weight across the harness so you can hang in it comfortably without the need of bulky foam padding. The Forged Speed Adjust buckle has a raised side rail that helps prevent abrasions against the webbing, an upturned baseplate that allows an easier lift for loosening, and a rear kick down on the top plate that eliminates any slippage while you climb.

The Ozone also features elasticized leg loops that softly secure your legs without the use of buckles, and you can adjustable the non-release elastic rear riser for an ideal fit. Four pressure-molded gear loops give plenty of space for all your quickdraws and other equipment so you're ready to send some of the longest, hardest, and most fun routes around. 

  • Kinetic Core Construction
  • Forged Speed Adjust buckle
  • Elasticized leg loops
  • Adjustable, non-release elastic rear riser
  • Four pressure-molded gear loops
  • Item #BLD001H

Tech Specs

210D nylon Bird Dobby, 3D AirMesh
Forged Speed Adjust
Adjustable Leg Loops
Gear Loops
Chalk Bag Hanger
Haul Loop
Claimed Weight
10.5 oz
Recommended Use
sport climbing
Manufacturer Warranty
1 year

Tech Specs

  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

Comfy and Light!

  • Familiarity: I've used it several times

This harness is one of the lightest - yet still comfortable - harness that I have ever used. It is a very simple design, with non-adjustable leg loops and a quick adjust waistbelt. These features are very useful for sport cragging, making it easy to slip the harness on and off in between walls. I've used it on two-pitch climbs and have yet to have an issue with comfort, but I could see where it may be a problem on longer and more time-consuming routes. If you're looking to clip bolts and climb single pitches, this is easily one of the better options available.

Light and comfortable

    I got a size M and I have a 30-31 in waist. I love the fixed leg loops and 4 gear loops so you you can send your next project without that added weight. If you need anything else this season, please feel free to contact me directly and I would love to help you get the best prices/gear advice. My direct email is Feel free to hit me up anytime. You can also keep up with my adventures on instagram @thebackcountrysky

    Simpler Is Better

    • Familiarity: I've used it several times

    I gave this harness as a gift and have this review to share:

    "This harness is overall extremely simple and takes a minimalist approach. Its one of the lightest harnesses I've ever used, however, that does mean there is a little less padding than other harnesses. The Sulfur color is awesome and there are plenty of gear loops (a total of 4) for you to haul whatever you need. As far as sizing goes, I am a 5'11" male and weight 180lbs. The medium sized harness fits me perfectly and I couldn't be happier with the fit."

    Great sport harness

    • Familiarity: I've put it through the wringer

    This is a great sport harness that has 2 gear loops with room for 20 or so draws. I don't use it for multi-pitch as it isn't the most comfortable to hang in; it doesn't have a ton of padding or adjustable leg loops but cuts weight for harder sport climbs. Falls in it are completely fine just don't hang in it for too long or you may run into some hamstring discomfort.

    Great sport harness

    Light and Comfortable

    • Familiarity: I've put it through the wringer

    I really enjoy this harness. So light yet still has the comfort. There is no haul loop. In order to attach my chalk bag, I stripped the core out of some paracord and tied it around the back between the elastic things. But yea, its a great harness. Less padding than others but totally work it if you want light. I've taken falls on it and it's pretty good!

    Light and Comfortable

    • Familiarity: I've put it through the wringer

    I started climbing at the gym after a 20 yrs hiatus, and figure my 25 yr old Petzl harness, that barely still fit, ought to be replaced. I was looking for light weight and comfortable, and I got both. This harness is the opposite of bulky (maybe svelte is the right word). It is also pretty comfortable. I don't know that I would like to be hanging in it for a multi day endeavor , but for sport or gym routes it's perfect. I even like the color.


    • Familiarity: I've used it several times

    I've been using this a few times a week for a few months now and I can say the only thing this harness is missing is a haul loop on the back. Given that this isn't really a big wall type of setup, I suppose it doesn't really need one. I guess it's not really much of a con when you consider what a lightweight harness it is.

    It's comfortable. My big legs fit in the loops just fine. The measurements seem spot on. It folds up pretty neatly for sliding into my small pack.

    Better upgrade

    • Familiarity: I've put it through the wringer

    Great sport climbing harness. This is a much better upgrade than the previous model. The leg loops don't fold up while your climbing like the previous one. Its also better put together. No loose threads or anything. Very lightweight, packable, and awesome for sending. Trad, Sport, this harness is great for everything. If your looking for a lightweight bomber harness look no further.

    Anyone know how this is changed/upgraded...

    Anyone know how this is changed/upgraded from the previous Ozone model?

    Best Answer

    well dude I admit I own neither versions. the only research answers I could find is the simple once saved (2014 10.5 oz vs 2013 11.3 oz) and new color. the reviews say it's a great, lightweight, and comfortable harness. and with the upgrades over the years the new models come with four pressure molded gear loops and the elastic on the leg loops have quick release buckles.