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Black Diamond
Momentum AL Harness

In Stock  Product Number: 27808

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Black Diamond's Momentum AL Harness gives climbers of any discipline the same comfort, ventilation and durability that Black Diamond harnesses are known for, at a price fit for dirtbags and new climbers alike. Black Diamond's designers outfitted the Momentum AL with a traditional waistbelt buckle and trakFIT leg loop adjustment system, which uses a simple, secure slide adjuster to quickly and easily adjust the diameter of the leg loop and provide a wide range of fit. The waistbelt is built with our Dual Core Construction, which uses two slim bands of high-tensile webbing on the outer edges of the waistbelt and a venting OpenAir foam insert in the center to offer breathable, lightweight comfort without pressure points.

* This product does not qualify for shipping to all countries.


  • Traditional, fold-back waistbelt buckle
  • Bullhorn-shaped OpenAir waistbelt built with Dual Core Construction
  • Patent-pending trakFIT leg loop adjustment for easy, worry-free adjustability of OpenAir leg loops
  • For saftey, this product CANNOT be returned

Gender: Unisex
Season: F13
Vendor ProductId: 651053
Review ProductId: 11534


by PowerReviews
Black DiamondMomentum AL Harness

(based on 35 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.


  • Comfortable (4)
  • Simple (4)
  • Durable (3)


    Best Uses

    • Indoor (4)
    • Long climbs (4)
    • Outdoors (4)
      • Sizing:
      • Feels full size too small


        Feels half size too small


        Feels true to size



        (5 reviews)

        Feels half size too big


        Feels full size too big

      • Reviewer Profile:
      • Casual/ recreational (4)

    Reviewed by 35 customers

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    Excellent, XXL fits larger guy

    By Julie

    from Julie ordered it for Phil--SW Colorado

    Comments about Black Diamond Momentum AL Harness:

    I am a larger guy, and most BD harnesses in XL don't fit, except the Bod Harness. I tried a Bod harness in XL, and this in XXL, and the Momentum just fits and feels better. The gear loops are farther forward than my old Alpine Bod, so they are easier to use.


    Excellent Starter Harness


    from Ontario, Canada

    Comments about Black Diamond Momentum AL Harness:

    This was the first climbing harness I purchased for personal use. Ive climbed indoor and outdoor with my Momentum and ive had zero issues with it in the 2 years of use. I was immediatly drawn to it for 2 reasons, the buckles and comfort. The quick locking waist buckle conveniently eliminates the necessity of doubling back the belts excess through the buckle. The leg loop sliding buckes adjust easily to fit the climbers thighs and can by tightened or loosened off quickly even with gloves on. I think ill be using this one for a while! For size, I wear a LARGE. I am: 6`0`` 190lbs 33`` waist



    By Tim

    from Colorado, USA

    Comments about Black Diamond Momentum AL Harness:

    This is a great package for the beginner & beyond! I've purchased these harnesses for my clients to use on guided climbs and wouldn't you know they come back with the same package of their own the next time. It's simple, comfortable and when I was waiting on my new harness to arrive, I used a momentum for a couple weeks. It was more comfortable than my previous $110 harness of another brand. No complaints about this harness, it's worth every penny. Chalk bag is nice....comes with a chalk ball. Classic carabiner, what more can I say. Buy with confidence.


    Perfect fit for me, budget

    By John

    from Undisclosed

    Comments about Black Diamond Momentum AL Harness:

    My second harness, and I prefer the double back waist belt for reassurance. I love the simplicity and price. The belay loop also seems sturdier than my last harness.


    Best harness out there!

    By Natalie

    from Troy, AL, USA

    Comments about Black Diamond Momentum AL Harness:

    I've had this harness now for a year and a half, and I don't think I'll ever wear another one. I wear my harness daily, whether I'm belaying, climbing, zip lining, or going through high ropes courses. I can go all day wearing my harness and it's as comfortable as can be! I've recommended this harness to many friends, and they love it just as much as I do!


    Great first harness

    By Lachlan

    from Adelaide SA, Australia

    Comments about Black Diamond Momentum AL Harness:

    Bought this harness as my very first harness for climbing. I've used it indoor and outdoor climbing and abseiling. Very comfortable harness although I did occasionally have some discomfort around the legs but this was stopped with some quick and easy adjustments.


    Good start up package for the price

    By Trever

    from Undisclosed

    Comments about Black Diamond Momentum AL Harness:

    Harness is good however my 3rd climb I was climbing a chimney and my right leg strap contacted the rock where the plastic leg tensioner is and it broke. Would be great if these were made of aluminum or a more durable plastic. Chalk bag and belt that came with it were perfect and the carbiner and belay device are as good as any! Good product for the money but always room for improvement!


    Solid all-around

    By Stephen

    from Undisclosed

    Comments about Black Diamond Momentum AL Harness:

    This was my first harness, and I used it for several years. Solid. Used it in the gym, sport, and canyoneering. A great harness at a great price.


    Solid all around harness

    By Alma

    from Undisclosed

    Comments about Black Diamond Momentum AL Harness:

    I bought this to replace my 5-year old Momentum AL Harness. The old waist strap was stiffer and therefore easier to thread through the buckle. Other than that this new harness is looking to be a solid replacement. I put my old AL through a lot of climbing, from sport to trad to aid, and this one looks to do more of the same for me. The trakFIT leg loops are a nice addition to an already solid design.


    Best for the Price

    By Eric

    from Trinidad, Trinidad and Tobago

    Comments about Black Diamond Momentum AL Harness:

    I have had this harness for 2 years (L). Put this through waterfalls, rains, and dirt. (Never had it in snow or ice.) The double back buckle is second nature now, and becomes as fast as a pre-threaded one to put on. After some rough terrain and time, all the gear loops are still fine and harness has great durability for its price. Have used it at least once a weak.

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    Do you have questions about this product?

    get answers from real customers and in-house experts with AnswerBox.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      in the sizing for the harnesses .... waist size is measurable ... what is to be measured for the "leg" measurement ...??
      Asked on 1/10/2015 by Grammy

      1 answer

      • Staff Reviewer


        Measure around the widest part of the thigh. The leg loops will typically sit above this point, but you need to be able to step into the harness.

        Answered on 1/12/2015 by Jeff from Rock/Creek
    Displaying question 1

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