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Black Diamond
Distance 4L Hydration Vest

4.7272727272727275 out of 5 stars
11 Reviews


Size Chart


Why We Like The Black Diamond Distance 4L Hydration Vest

Generation two of Black Diamond's Distance 4L Hydration Vest takes us even further, thanks to the new stretchy and supportive construction. The running harness-style suspension system stretches from the sides across the back panel to offer comfort during training sessions, races, and fast-paced hikes. The stretch side panels provide a secure fit, and the integrated trekking pole carry loops keep Black Diamond Z-Poles fastened across our back to free our hands for scrambling. Front pockets stash the included soft flasks for on-the-go hydration, the pass-through lumbar pocket provides storage for an extra layer, and an abundance of other stretch and zippered pockets keep all our on-trail essentials within reach.


  • Distance-focused running vest engineered for comfort on the trail
  • Suspension harness and stretch materials deliver a bounce-free fit
  • BD HydraPak SoftFlasks included for hydration on the move
  • Reflective details keep runners visible in low light
  • Over-the-shoulder Z-Pole carry secures collapsible poles across the back panel
  • All-around pockets provide storage for keys, gels, layers, and other running necessities
  • Item #BLDZ9OB
4L (244cu in)
running harness
Hydration Compatible
2 flask pockets
Reservoir Included
2 BD HydraPak SoftFlasks
1 drop-in front, 1 zippered front, 1 pass-through lumbar, 1 zippered back
Trekking Pole Carry
over-the-shoulder Z-Pole
Claimed Weight
trail running, road running
Manufacturer Warranty
1 year

Overall Rating

4.5 based on 11 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 1 reviews
5 Stars - 9 reviews

What do you think about this product?


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5 out of 5 stars

February 26, 2024


Great fit on this vest with lots of little compartments to keep all your gear tucked away. Best feature? The On-the-go Z-Pole storage. Brilliant!

Jason G.

Originally reviewed on

5 out of 5 stars

February 8, 2024

Great vest

Does what I need it to do on long runs. Great storage and no chafing. Thanks!

martin s.

Originally reviewed on

5 out of 5 stars

December 7, 2023

Pleased with first vest

5’9” 145 lbs male. I got the small and it fits great. The pockets are convenient and hold well


Originally reviewed on

5 out of 5 stars

October 14, 2023

Pushing the Culmination Point

Can't get over how much space for food and water this pack provides! Ample pockets and features to sustain your endurance feats and stave off the bonk. Also, design fits super snug to the body to reduce bounce during runs. 165lbs, 5'10" - purchased a Medium.

Hunter H.

Originally reviewed on

5 out of 5 stars

September 6, 2023

First Vest

First time wearing a vest, I loved all the storage, and it's easy easier to get water compared to sticking through a hose on a normal hydration pack.

Brett C.

Originally reviewed on

3 out of 5 stars

August 8, 2023

Trail Runner

This was my third purchase of the Distance 4 hydration vest, my last one was being held together by safety pins. I purchased a M's size medium based on the sizing guide but should have gotten a small as the medium was bouncing on me as I ran (especially after getting tired). I am a 5' 6" female with a torso circumference of 34" so Medium made sense, and I didn't know it wasn't the correct size till I was ~10 miles into my long run so can't return the used pack, I am considering investing in the Small so I can use the Medium when the weather gets colder and I am wearing more layers under the pack. In the newer model the water bottles are positioned higher (which is really nice) and it seems to come with skinnier water bottles compared to my older ones. The pack comes with 500ml capacity soft water bottles on each side x2, which has been GREAT for races with AS's every 5-10 miles, when I am not racing or doing supported efforts I am able to carry a filter easily in the small back pocket... or since it is summer and creeks are drying up I can fit a and carry an additional 1.5L bladder in the back large pocket. Overall I am happy with the pack and like the newer bigger pockets, kind of bummed there is now only one zipper pocket but it is twice as big as the older ones were. Pretty bummed I didn't get the smaller size which is why this is a 3 star review and not a 5.

Molly K.

Originally reviewed on

4 out of 5 stars

August 7, 2023

Great for everything except on bare skin

Love this vest. Looking forward to trying out the pole carrying system ASAP but so far I'm a big fan of all the features. The vest fits very similarly to Salomon's vests in that it really feels like an extension of the runner rather than a backpack. I wore this on one training run before wearing it for a 50k and throughout both runs I hardly knew it was there. Chest pockets aren't too cumbersome and the bungees that keep the SoftFlasks in place are money. The back lower pocket is accessible on the fly making it perfect for a rain or extra layer. There's another compartment on the back that's enclosed by a zipper which I found perfect for stashing extra gels I wasn't sure I would need. This little pocket is perfect for storing all the things that may not get used during a typical run. This vest IS also reservoir compatible and I really didn't notice much sloshing around throughout the run. What it doesn't have is a dedicated slot on the top of the shoulder strap to run the reservoir tube through, but this really wasn't an issue at all as it does have a little loop you can thread the tube through right above the chest pocket. The ONLY thing I didn't like about this vest is the material that's being used on the inside. On my training run, I had a singlet and noticed that it was rubbing on my back and shoulders a bit. I ran the last 10 mins without a shirt and definitely began to chafe. I ran in a t-shirt during the 50k instead of a singlet because of this and had zero issues with chaffing. This was something I didn't like about Salomon's Adv Skin 12 vest and the Distance 4 Hydration Vest seems to be the same. The material that Nathan uses for their hydration vests seems to be the most friendly on bare skin, but the Distance 4 Hydration Vest fits so much nicer. I really didn't notice I was wearing a vest throughout the 50k until I needed something from it. I would for sure give this vest 5 stars if it didn't chafe on bare skin.

Jason L.

Originally reviewed on

5 out of 5 stars

August 2, 2023

Great bag

Used it for a 50k and it worked really well. Very comfortable and easy to use.

Olga H.

Originally reviewed on

5 out of 5 stars

July 6, 2023

Great vest, well thought out

I have the gen 1 vest. It fits great until loaded up, then it’s a little small and the bottles, snack storage pockets are more to the side than I’d like. Wore this for what I expected to be a 6+ hour mission and it had plenty of capacity for snacks, layers, phone, satellite communicator, and a water filter. (That run/hike/scramble ended up being 8 hours and the vest was extremely comfortable.) I love the fit when not fully loaded, I don’t think I would have liked the fit of the next size up though. Very happy with this vest but may use another product for those longer missions. Can’t wait to use this on my upcoming 20-30k races and will continue to use it for half-day runs. I want to reiterate how comfortable this vest was over the course of that 8-hour slog - I didn’t even notice it. It just carried my stuff and stayed quiet - my body was sore but the vest was incredibly comfortable.


Originally reviewed on

5 out of 5 stars

June 4, 2023

Love it!

I love this vest. Used a friend's of mine on a trip to Alaska and almost immediately bought one on my return to the east coast. Very stable, and love the spot where keys rest, on the right shoulder, which means the weight of the vest keeps them from jingle-jangle-ing during a run! Lots of practical pockets and the vest feels great!

James G.

Originally reviewed on