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Black Diamond
Momentum Harness - Kids'

4.863636363636363 out of 5 stars
22 Reviews
Current price: $37.46 Original price: $49.95
25% off


Size Chart


Momentum Harness

The kids' version of the Momentum has the same features that Black Diamond's adult harnesses have. Its Dual Core construction separates a single strand of webbing to ridge above and below hipbones for a secure fit without much weight, and OpenAir foam cushions the waist with breathable comfort. The self-locking Speed Adjust waist buckle tightens in a cinch while the adjustable leg loops keep it snug—and it even has gear loops so your young crusher can keep track of their mini-rack.


  • Fully featured kids' harness for the next generation
  • Dual Core construction is lightweight and supportive
  • OpenAir foam balances between cushy comfort and ventilation
  • Self-locking waist buckle makes getting ready a breeze
  • TrakFit leg loop adjustments grow with your kiddo
  • Item #BLDZ97C
Dual Core Construction
OpenAir Foam
[waist] Speed Adjust
Gear Loops
Claimed Weight
Leg Loops
adjustable, trakFit
Manufacturer Warranty
1 year

Overall Rating

5 based on 22 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 1 reviews
5 Stars - 20 reviews

Fits Slightly Small

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

November 28, 2023

Tough little harness

Gets the job done well for my kids. Easy leg tighten

Scotty F

Originally reviewed on

5 out of 5 stars

November 19, 2023

great fit

Kids just got into climbing and found this harness has the best fit for him. He love it

Philippe C.

Originally reviewed on

5 out of 5 stars

November 2, 2023

Great Kids Harness

Harness fits well for my 1st grader and 2nd grader. Both are about 45-55lbs. Similar to clothes, this will likely be outgrown in a year or two. We switched a little late from the full body harness, so I think we’ll get a little less use out of these before we need to transition up. Ultimately, our kids love them… and love that they now match the adults.

Travis M.

Originally reviewed on

5 out of 5 stars

September 11, 2023

Not as link as I thought it'd be. But it's up to the black diamond standard. Daughter loved it.

Not as pink as I thought it'd be. But it's up to the black diamond standard. Daughter loved it.

Michael M.

Originally reviewed on

3 out of 5 stars

September 2, 2023

SMALL! Listed measurements not accurate

Bought this for my 11 yo daughter. I measured her prior to buying. She has a 25" waist and 16" thighs so should fit this harness really well based on the measurements listed. The legs were tight and the waist barely fit with no room left for adjustment. We tried it on my 6 year old (he's tall for his age and skinny but didn't get his measurements) and it fit him pretty perfectly. We ended up getting a womens XS momentum harness for my daughter. It fit well cinched all the way down so she has a lot of room to grow in that one.


Originally reviewed on

5 out of 5 stars

June 26, 2023

Perfect for a 5 year old

My 5 year old niece fits perfectly into this and it feels secure for her. We do check every climb and occasionally re-tighten it for her. But she has a great time with it, and will for a long time! She is already not at its smallest settings, but has a ton of room to keep growing, still!

Charles L.

Originally reviewed on

5 out of 5 stars

February 19, 2023

High quality harness

Well designed brightly off color belay loop makes it easier to communicate with the kiddos. Easy to adjust leg loops, waist strap is a bit stiff.

Steven M.

Originally reviewed on

5 out of 5 stars

February 2, 2023

Keep the kids Safe!

Peace of mind for the little ones with a solid harness!!

Ben K.

Originally reviewed on

5 out of 5 stars

January 6, 2023

Great size for my two girls (5 & 7)

Fits as expected and has some room for them to grow in it and last them awhile. They seem comfortable in it and love the colors.

Kevin K

Originally reviewed on

5 out of 5 stars

December 18, 2022

Great harness!

This is a perfect fit for my six year old. It’s adjustable, so there’s room to grow, and the blue is gorgeous.

Johnnie S.

Originally reviewed on