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Black Diamond Momentum Full-Body Review

This harness is extremely easy to get on and off and is comfortable both on and off the wall.
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Price:  $70 List | $52.46 at Backcountry
Compare prices at 2 resellers
Pros:  User-friendly, comfortable, lightweight
Cons:  Limited uses
Manufacturer:   Black Diamond
By Adam Paashaus ⋅ Review Editor  ⋅  Jun 7, 2019
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#3 of 10
  • Hanging Comfort - 40% 9
  • Standing Comfort and Mobility - 20% 9
  • Features - 20% 7
  • Versatility - 20% 6

Our Verdict

Since the Black Diamond Momentum Full Body is designed using the same technologies as the adult versions, it ends up being both super comfortable and one of the lightest tested full body harnesses. The craftsmanship and design are top notch, and the simplicity assures both kids and adults will have no trouble getting it on and adjusted. The foam padding is both soft and breathable, and even though the leg loops don't adjust, they did a great job of keeping our testers comfortable - even for extended periods of hang time.

Updated Colors

Black Diamond updated the Momentum Full Body harness with some new colors since our test period, but otherwise, the design is unchanged.

February 2020

Compare to Similar Products

Our Analysis and Test Results

While it may not be the most versatile harness, it makes up for it by having a great design that is both comfortable and easy to use.

Performance Comparison

Cruising the upper portion of a St. George trad route  feeling comfortable in the Momentum Full Body.
Cruising the upper portion of a St. George trad route, feeling comfortable in the Momentum Full Body.

Hanging Comfort

The Momentum Full Body is an amazingly comfortable kids harness. BD uses the same strap construction as they do with some of their adult versions, resulting in a harness that disperses the weight of a hanging climber surprisingly well. The leg loops originate from the hips and cradle the legs as opposed to the way a sit harness feels.

Lowering off is comfortable in the Momentum Full Body.
Lowering off is comfortable in the Momentum Full Body.

Standing Comfort and Mobility

Just as with hanging comfort, standing comfort and mobility are also very good. A front buckle keeps the shoulder straps in place and holds the tie in points close together for easy access for tying in. We loved the lightweight padding on the shoulder straps, which wrap around to the similarly padded back panel. The whole thing, both leg loops, and upper harness, move well with a kid's every move while climbing and crawling in the dirt.


The Momentum has a simple yet techy design. A front buckle makes getting it on quick and easy for little kids and helps hold everything in the right place while you're not tied in. A small elasticized padded back strap helps support the lower back when hanging; the way the leg loops originate from the outer hip means no elastic risers are necessary to keep them from sagging.

The pre-threaded speed adjust locking buckles are easy enough for many kids to do themselves.

The Momentum Full Body is easy to use and provides a comfortable hang.
The Momentum Full Body is easy to use and provides a comfortable hang.


The Momentum Full Body isn't quite as versatile as some of its competition. Not only will it not fit the littlest of kids but it doesn't have any features that would help in more advanced climbing scenarios like gear loops or a belay loop. If more advanced climbing is in the cards, the Petzl Ouistiti would be a better choice while still offering a comfortable hang.

Big sister tries out the full body Momentum.
Big sister tries out the full body Momentum.

Best Applications

Being super comfortable and supportive to hang in, die-hard kids that are planning on spending a lot of time top roping at the gym or crag will love this harness. With such a simple easy on/off design and smooth sliding buckles, kids can throw it on and get adjusted without help from an adult, other than a check over.


At $70, this harness is a good value. The comfort alone, being much better than many of its competitors, makes it a great deal on a great harness. Parents will love the super easy "step in, pull on like a vest, and buckle the front" design that saves them from having to fiddle with tons of buckles, instead allowing their mini-me to do it themselves.


Black Diamond did a great job designing this harness. Not only does the harness look quality and high tech, but the padded shoulder harness and leg loops do an excellent job of supporting the climber's weight. Any kid who has a brand new passion for climbing often will love this comfortable, sporty harness.

Certainly one of the most comfortable harnesses tested  period.
Certainly one of the most comfortable harnesses tested, period.

Adam Paashaus