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Black Diamond
Momentum 4S Harness

4.78125 out of 5 stars
32 Reviews
Current price: $56.21 Original price: $74.95
25% off

Style & Size:

Size Chart


Why We Like The Momentum 4S Harness

Conquer the crag with reliable support in Black Diamond’s Momentum 4S Harness. This versatile harness features maximum adjustability for a large range of fit, with two speed buckles at the waist, and one at each leg loop for easy adjustment whether you’re climbing with your winter-warmest gear on, or going minimalist in scorching heat. A tall, bullhorn-shaped waist belt keeps comfortable for long belays.


  • A adaptable and versatile harness for all-purpose climbing
  • Maximum adjustability accommodates winter or summer layers
  • Two speed buckles at waist and each leg loop for secure fit
  • Tall, padded bullhorn shaped belt is comfortable and supportive
  • 4 pressure-molded gear loops secure all of your essentials
  • Item #BLDZ97B
Dual Core Construction
Speed (pre-threaded)
Gear Loops
4, [XX-small/small] 2
Claimed Weight
Leg Loops
adjustable, speed buckles (pre-threaded)
Manufacturer Warranty
1 year

Overall Rating

5 based on 32 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 4 reviews
5 Stars - 27 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

February 11, 2024

Great beginner harness, comfortable and adjustable

Great beginner harness for gym climbing. Step right in and with a few quick adjustments, you’re ready to go. Padding seems great. No complaints at all. Thanks BD.

Cord R.

Originally reviewed on

5 out of 5 stars

February 9, 2024

Comfortable and adjustable harness

I bought the L / XL version of this harness. I have a 33” waist but feel as though this harness fits me well. I have used this only in the climbing gym but really like the fit and comfort it provides.

Bill S.

Originally reviewed on

4 out of 5 stars

September 24, 2023

Very comfortable. I got the

Very comfortable. I got the large and I have a 32” waist but larger legs. You will need a large if you fit this category.

Rob M.

Originally reviewed on

5 out of 5 stars

September 22, 2023

Great Harness

Very comfortable harness. Very easy to use. Extremely lightweight.

Allyn W.

Originally reviewed on

5 out of 5 stars

March 27, 2023

Favorite Harness Yet

I’ve had a couple harnesses so far, and this is by far my favorite. Very lightweight and comfortable.

Arsen A.

Originally reviewed on

5 out of 5 stars

March 24, 2023

Good fit and comfortable

I'm new to climbing and this does a great job for the price. Comfortable and adjustable.

Michael L.

Originally reviewed on

5 out of 5 stars

February 22, 2023

Lovely harness. Fit is very

Lovely harness. Fit is very adjustable. 32 inch waist and above get a m/l anything under; go s/m. I have a 29-32 inchish waist and I still had plenty of room for adjustments. I personally have had some weight issues so I wasn’t able to get a dead on size harness. I used to be 180 and a large harness was it for me. The wide range in the size really takes out a lot of guesswork. If you’re worried about it being too big it goes there. If you’re worried about being too small it goes there as well.

Johnathon M.

Originally reviewed on

5 out of 5 stars

February 16, 2023

Almost a perfect harness

Great harness, especially for such a deal on Expert Voice. However, I do have one issue to highlight for others. Although this harness has a ton of adjustability and comfort items, the thigh loops are too narrow. If you are a person who hikes and does leg day in the gym, you may have some issues with leg loop diameter. I am just barely able to use the harness while having plenty of spare room in the waste, and only an inch (at most) of slack left in the leg loop straps when tightened securely. Most climbers are built like a 2x4 piece of lumber, yes, but it wouldn't cost anything to add another inch of leg loop slack.

Chris S

Originally reviewed on

2 out of 5 stars

February 13, 2023

Not too happy

Fits well….one very major problem. It doesn’t “actually” fit. They sewed the harness “upside down and inside out”😭 we juz bout died. I really feel like im owed compensation shouldn’t have to pay 70 to untangle a upside down inserted fabric. Since it happened to be sewn inside out the legs straps are twisted.

Johnathon M.

Originally reviewed on

5 out of 5 stars

January 13, 2023

Great fit, very comfortable, easy to adjust, wide range of adjustability, good quality. Also it shipped out quickly.

Kerry S

Originally reviewed on