Collecting every piece of gear takes a little time.
We think it's worth the wait.

Nice choice!
Give us a moment to collect those options for you.

 The Momentum AL is officially retired.You've found a page of history! The Momentum AL is no longer produced by Black Diamond and it is not available to buy from major online retailers. You can still check out all the specs and claim your ownership.

Black Diamond Momentum AL
  • Black Diamond Momentum AL
  • Black Diamond Momentum AL Side

Momentum AL

Black Diamond


My vote: None ( 5.2 avg )


The Momentum AL 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. We outfitted the Momentum AL with a traditional waistbelt buckle and our 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.

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
Adjustable, releasable rear elastic riser
4 pressure-molded gear loops
12 kN-rated haul loop

Retail price

US$ 45.95
Weight (g)


In grams, the weight, as stated by the manufacturer/brand.

If there are differences in weight (due to multiple sizes or optional accessories) we'll list them here.

The default weight is the middle-most size, often this is size M.

410 g

Gender Unisex
Sizes S, M, L, XL, XXL
Gear Loops

Number of Gear Loops

Gear loops are used to hold gear (quickdraws, cams, etc) onto your harness. 4 gear loops is most common.

0 - 1 Gear Loops

Most often on full body harnesses or guide/gym style harnesses.

2-3 Gear Loops

Mostly found on lighter harnesses made for [ski] mountaineering or high-end sport climbing where weight is a high priority.

4 - 5 Gear Loops

The standard/most common number for climbing harnesses. Perfect for sport and trad.

More Than 6 Gear Loops

Designed for long multi-pitch and big wall climbing, found on harnesses made to hold the maximum amount of gear.

Worth Considering

Occasionally, the number of gear loops will change on a harness model depending on the size. There could be 7 gear loops for the med/large but only 5 gear loops for the xsmall/small. In this case we list the highest number for the filters, and then write an explanation on the product page like, “Size S/XS can only fit 5 gear loops.”

4 Gear loops
Ice Clip Slots

Ice Clip Slot

Ice clipper slots are made to fit a carabiner that holds ice screws. These slots are generally only used by ice climbers but there is no disadvantage to having them on your harness.

Less than 40% of harnesses will have ice clipper slots. And those harnesses will usually have 2 or 4 slots, often located next to, or between, the gear loops.

No, 0
Belay / Tie-In One Loop
Waist Buckle Type Manual Doubleback
Leg Buckle Type Quick Adjust
Drop Seat Yes
Haul Loop

Haul Loop

Trad climbers often look for a haul loop as they're intended to haul a rope (second line) or pack (while you climb the chimney).

A haul loop can also hold shoes or other accessories. Although not the intended use, it is also commonly used to hold a chalk bag.

Yes  (12kN)
Certification ­
Size Chart

Waist: 69-76 cm / 27.2-29.9 in
Legs: 45-56 cm / 17.7-22 in

Waist: 76-84 cm / 29.9-33.1 in
Legs: 51-61 cm / 20.1- 24 in

Waist: 84-91 cm / 33.1-35.8 in
Legs: 56-66 cm / 22-26 in

Waist: 91-99 cm / 35.8-39 in
Legs: 61-71 cm / 24-28 in

Waist: 100-114 cm / 39.4-44.9 in
Legs: 66-76 cm / 26-29.9 in

2015 Harnesses

Introducing 2015 new harnesses.

Details of Momentum and Primrose Harnesses

This video explains all the features and benefits of Momentum and Primrose Harnesses.

Highlight of Momentum DS, Momentum SA, Momentum AL, Primrose SA, Primrose AL and Wiz Kid Harnesses
Wearing Instruction for Black Diamond SA and AL Harnesses

No voice but very informative video for the Momentum SA, Primrose SA, Momentum AL and Primrose AL Harness users.

No reviews yet.

Climberism Gear Review

The bottom line is that the Momentum AL harness is an excellent all-purpose, lightweight, comfortable, easy to use harness for a very affordable price.  I could probably sleep in it and feel sexy.

Rock and Ice Gear Review rating 4/5

With sculpted, compression-molded padding, the Momentum AL maintains its shape, one of the attributes I most appreciated. When you take the harness out of your pack, it isn’t all twisted up and you can quickly discern the right from left leg loop. I found the leg loops and swami supple and while hanging for hours on end, I didn’t notice any pressure points.
For a one-harness-does-it-all model, I give the Momentum two thumbs up. If you prefer the convenience of single-pass speed buckles, that feature is available on the same harness, the Momentum SA. Women can check out their version of the Momentum, the Primrose AL.

Climbing Gear Review

Performance: For trad routes in Joshua Tree, California, and sport missions in Maple Canyon and American Fork, Utah, this addition to the Momentum lineup has proven to be a comfortable and versatile harness with a few upgrades. Black Diamond redesigned the Speed Adjust buckles—which had little issues with slipping in prior testing—by shrinking the space for the webbing to pass through just enough so that the buckles bite firmly without being difficult to tighten and loosen. “I was impressed with the durability,” one western states tester said. “After more than six months of testing, including some burl-fest chimneys, it showed no signs of wear.” Open-hook seat attachments made it easy to drop trou when nature called, and full waist and leg adjustability was ideal for conditions and climbing from hot to cold. “Sport, gym, or trad, the Momentum 3S has
been pure joy thanks to the comfortable webbing and foam insert construction,” one tester said. “Not to mention it’s a steal at $60.” Four pressure-molded gear loops were big enough for every route that wasn’t a big wall, but it maintains an airy weight at 13 oz., so it’s packable and doesn’t add bulk to any gear-intensive backcountry pursuits.
Cons: Sizing seemed small on this model (and other Black Diamond models), so try on before buying or size up with plans to cinch down. Word of caution for short people: Gear loops hang draws and other pro extra-low.
Conclusion: Full adjustability and do-everything design make this nearly perfect for everything on rock. It’s also the least expensive harness in the review, and one of the cheapest on the market.

The UIAA equipment standard provides a baseline for equipment performance in a test lab under controlled conditions on new equipment. Although these test conditions are relevant to the conditions encountered climbing, conditions encountered at the crags and the condition of the equipment are equally important. This recommendation from the UIAA member federation The British Mountaineering Council (BMC) provides vital equipment information that is NOT explicitly addressed in the standard, particularly failure modes of the equipment and recommendations for the use, inspection, maintenance, and retirement of equipment.