Momentum 2.0 Race Vest

(18 customer reviews)


The original Momentum’s accessible rear water bottle pockets were very popular among our athletes. The Momentum 2.0’s Fluidic holsters have taken this feature to the next level. These new pockets are more intuitive and easier to access due to the inclusion of a magnetic closure and rail-like system. This design makes it easy for you to reach back behind your hip and grab or stow a bottle while on the go. This minimalist 6 liter vest has been outfitted with UltrAcool Light Mesh which provides a very breathable and lightweight feel and increases pack durability. An upgraded shoulder pocket has been added allowing you to carry any size cell phone. Shock cord has been added to both front strap pockets increasing versatility among what gear or bottles you choose to carry. The main compartment has been modified to a quick stash style which allows for easier access on the go as well as increased capacity. The Momentum 2.0 is Z-pole compatible.

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Recommended Use:
Very lightweight race vest for the minimalist runner who prefers bottles in the back. With multiple stretchy mesh pockets available it is perfect to keep the gear organized and accessible.

• Sweat Proof Webbing—won’t absorb water or get saturated and heavy.
• Safety stitched bar tack on all stress points.
• Quiet, bounce free, easy to see and use, zipper pulls.
• Zig zagged stitching over elastic for ultra-durability, increased stretch and rebound.
• Plush feeling micro-fiber polyester edges, soft and non-abrasive against skin and clothing.
• Magnetic pocket with automatic magnetic closure for rapid access to essentials. Patent pending.
• Silicone and PU coated feather-weight nylon fabrics resist water, abrasion and tears.
• Lightweight, soft, breathable, but strong, large-holed mesh pulls moisture away from the body to keep skin dry and cool.

Fit:  Unisex
Size(s):  SM (26″-35”) MD (32”-38”) LG (38”-46”)
Color:  Black/Red
Hydration Compatible (not included):  4 x UltraFlask 550
Weight: 8.0 oz (227 g)

Additional information

Weight 0.5 lbs
Dimensions 13 × 9 × 3 in

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Fluid Capacity

4 x 550 mL UltraFlask (Sold Separately)

Total Volume

366 c.i. (6 L)


18 reviews for Momentum 2.0 Race Vest

  1. Eric J Cukierski (verified owner)

    I was probably the first person to actually get to wear and use this vest while running an actual race. I happened to be in Utah to run the Zion ultra, 50k , so I arranged to pick mine up as I was hoping to use it for the race. Jodi in customer service went way above and beyond to arrange for me to be able to get this vest in time for my race as they were delayed due to covid. I broke my own rule of using something in a race that I had never used before, and the vest performed perfectly! The bottle system took about 2 x getting a bottle out and returning it to its holster to get the hang of it, loved it, very easy to use! This vest is very light compared to other vests which seemed to like wearing a winter vest for warmth. My race was 95 degrees, but this vest did not contribute to being hot, it is light and well ventilated for air circulation. the material is stretchy and tough and ventilated, I could not be more pleased with finding this vest, I will never use anything other than Ultraspire again after seeing the quality of it and outstanding personal customer service, top notch in every way. An ultra runner cannot go wrong with this vest, plenty of pockets, and back compartment stretches to hold way more than it looks like it would, and more importantly, hold things comfortably with no bounce or rub to lead to blisters, as I carried everything I could need for 50k except filling up bottles at the aid stations.

  2. Justin

    The Momentum 2.0 is just what the doctor ordered. It is light, fits perfectly, and is full of features considering it is a stripped-down racing vest. The quality is topnotch. My wife was immediately envious and started considering how to replace her current racing vest from another company with a Momentum 2.0.

    As for sizing – I am 6ft/160lbs and the Medium was perfect. If my weight was closer to 180lbs, I would consider the Large.

    5 ***** for the vest

  3. Gunhee (verified owner)

    Went on my first 15 mile run this weekend to try this out. Was very happy with it. Didn’t affect my running at all, and the water bottles were easy to grab from the back. It did take some practice to make it feel natural when you’re putting the bottle back in after you’re done drinking, but felt good by the end of the run.

  4. David Jackson (verified owner)

    Got my vest last week. Tested on a seven miler and then a 15 miler. It was awesome having that much water with me loved all the pockets! I did have one of my bottles pop out during the run. Those rear holsters do take some getting used to.

    But the vest fits great, no bounce, and is very comfortable. I’m 5’8” 165 #s – medium build

  5. Sean McCarthy (verified owner)

    The vest fits great and is comfortable. Pockets are nicely positioned and easily accessible. My main problem is that when the water bottles are full they will not stay in rear pockets. The weight of the bottles pushes open the closure as soon as I start running and out they come. Frustrating since this was the main reason I got this vest , I dont really like bottles on the front. I have the Ultra flask 550 hybrid bottles.

  6. Jp

    Great fit and no bounce! Lightweight and does not get saturated with sweat although I was drenched afterwards. No chafing or hot spots. Plenty of pocket space. I used the front pockets to hold my nutrition during the run and enjoyed the ease of access. After a little practice I was able to efficiently use the back holsters for my bottles (I used the UltrAspire 550ml hybrid bottles and like them a lot!). Front carrying vests might be a little more convenient but the overall fit and comfort of carrying bottle in the back was definitely worth the getting use to! I found the trick to make sure they don’t bounce out during the run is to keep the pull strap/bungee tight. This does not affect getting the bottles in or out but does keep them in place during the run. I carried a phone on my run and did not even notice it was there. Overall this is a great vest and I would recommend to anyone looking for a minimal, lightweight and comfortable vest that can carry plenty of fluid or nutrition with little bounce.

    Noted, this was tested on a 20 mile run on rolling hills. Temperature was 70 degrees and very humid.

  7. Henry Howard

    The Momentum 2.0 race vest is an excellent vest, an improvement over the first generation. It is a great vest for racing. I used it for a trail ultra and was pleased how much I could safely store. The two bottles in the side pockets worked great, and I especially like the magnet that keeps them in place. Another great feature is the phone pocket on the shoulder, which is designed to accommodate any phone size, even if they continue to get larger. There is ample storage space overall, the fit is perfect and I did not get any chafing from the pack itself rubbing against me. i am so glad I have this vest and will continue to wear it for my races and long training runs.

  8. Richard Pescitani (verified owner)

    I have never run w/ a vest before and was searching for one for an upcoming Ultra run. When I found the Momentum 2.0, I instantly liked it due to the rear bottle storage. I ordered one and was put on the list to ship once recvd. Jodi was great in keeping me informed and answering my questions. The vest finally showed up 2 days before my PM2HR Ultra in NC. I filled it up and tried it on and it felt great. On to the actual vest review: Race day was nothing but heavy rain for most of the day. The vest held all of my essentials including small towels and socks in zip lock bags along w Z-sticks in the back pouch. It has so many pockets and places to put stuff that I was 10 miles into the race before I realized that I did not forget to pack an item but forgot what pocket it was in!! Throughout the entire race it felt great and despite the rain, I think it held up really well. The bottle holders took some time to get used to but worked well. One down side to the bottle holder, and I will need to confirm if it is material or rain related, is that the right side holder became loose around mile 27 or so and my arm would hit the bottle as it was “laying” down instead of a snug fit. The magnets seemed to be ok and I could sinch it up but it stayed loose. May have been due to the long day in the rain so I will see on my next run. Overall I am very happy with this vest!!

  9. Greg Schnoor (verified owner)

    I got mine a few weeks ago and have done 3 runs of marathon distance or further already to test it out. I’m really liking it so far! It’s lightweight, the bottles don’t bounce in the back and I have enough storage for my things (phone, key, headlamp, nutrition, etc.). The dry pocket seemed to keep things dry as well. It took me a few times to figure out how to take-out and put-in the bottles and keep them secure, but I figured out I just needed to tug on the string after putting the bottles back in and it would tighten things up – no bottles have dropped out. On one of the marathon runs I only used a small amount of anti-chafing to test how it would do and I had no chafing issues at all. I also tested dropping a third bottle of water in the back middle pocket and it didn’t rub me or bother me at all. So far it’s worked great and I’m looking forward to using it in an upcoming 100 miler. I have tried various hydration products over the past 7 years (55+ marathon/ultramarathons) and so far this has been my favorite. Great job thus far UltrAspire!

  10. Thomas Murray

    I love this vest so much! I was really concerned that the bottles in the back wouldn’t stay put, particularly when running downhill on trails, but both times I have taken it out they have performed just fine. I use the 550 ultraflasks, and I love that I can have bottles in the back and in the front. Add my 550 race handheld and I can take just over 2.5 liters out with me at a time and mix up what I have with me. That makes long runs on desert trails much, much better! The fit is great – love the angled shoulder straps – and there’s enough space to take with me what I need, but not so much space that I’m tempted to carry things I don’t. It’s an awesome companion to my Zygos for when I need a lot of hydration but not a lot of extra gear.

  11. Mike Kubicek (verified owner)

    This is a great vest. I initially ordered the large because my chest measure 39 inches, but I found the medium to be a better fit. I had a little bit of trouble getting the bottles back in, but once I figured it out, it worked great. I am impressed with how light the vest is, and how well it does in heat. Highly recommend this vest if you are looking for a bottle based hydration option.


    My first run in this was a 15 miler on the trails. It was light weight & breathable.

  13. Jenny Velocitas

    I have been wanting to try the Momentum line of vests because I had heard raves about it, but waited for the 2.0 to come out and it did not disappoint. I love the bottles on the back! About the bottles in the back – it does take a little to get used to and just to make sure they don’t come out, make sure you cinch it tight at the top. Overall, this vest sits very well and it’s very comfortable to wear on any distance. You can carry so much!

  14. Greg Pirtle (verified owner)

    UPDATE: UltraSpire customer support was awesome. They worked with me and totally resolved the issue. I have no issues with fluidic holsters anymore.

    I was really looking forward to this vest and it checks the boxes in almost every category. I like the magnetic closing pocket on the chest, I like the big stretchy pockets on the front, and I really like the sweatproof compartment in the main pocket on the back. However, its not all lemon drops and gum drops. I spend so much time pulling the cinch cords for fluidic holsters on the back. If the bottles are filled all the way up, they do not stay in the holsters and the cinch cords loosen dramatically causing them to feel unsecured. After the bottles get down to 3/4 full, they do a much better job of staying where they are suppose to be. This is a major setback for this vest and it does not really fulfill the need for which I bought it.

  15. sebastien brochard (verified owner)

    Got my vest delivered in Singapore. Was updated regularly on the adventurous Supply Chain story Ultraspire faced. So while disappointed by the delay, i was not left in the dark. Which is very important.

    To point again the great customer service, as a pre-order, i could not have the vest and the bottles in the same order, which led to a double charge of the international shipping. Sent an email … no question asked, i got of shipment refunded, and both orders packed in one. Does not sound like much, but it makes a difference!

    The vest itself …
    I’m a triathlete, living in Singapore. I rarely do trails, but i do run a fair bit, and do a fair bit of bike, in a hot environment. Needless to say, i need food, and drinks.

    After 2-3 months, the vest has proven awesome. It’s light, fits great and feel adjustable easily enough. There’s plenty of pockets that keep things in well. I’m able to go out with with the 2 bottles on the back sides for an hour and a half. I can easily at up a bike bottle in the main pocket for an extra hour +. That gives plenty of independence. Could probably fit in my old bladder (1.4L) in there. But haven’t faced the need so far.

    It is super breathable. It’s the first time i can really say that from a product. I’m drenched after a session, nothing breathable has ever finished a session on me dry. this beast, still gives the feeling it is dry … i can’t squeeze a drop of sweat out of it. On my big running day, i rinse it with water, and a few hours later it ready to go for round 2.

    What i’m not sure i like:
    – i don’t feel an added value coming from the magnet system at the back. I think i would have been happy with an elastic solution. I’m also wary of how long the fabric last pulling/rubbing the magnet. Time will tell. Not a deal breaker at all. Just questioning my liking, as it’s presented as a new feature.
    – there are mane strings all over. I don’t need them, and can’t begin to understand what they could be used for. I did a few trail race in China & Vietnam, and can’t recall anything i had with me that use those strings. Maybe it is useful to the very extreme, super long distance people. For my level, it’s just in the way of my things and my hands.

    But overall, i love it. the fit awesome, i don’t get chaffing around the neck anymore. it’s light, but still feel structured, so it’s does not feel flimsy. Good piece of kit!

  16. Andrea Chickness

    Wow! As a petite runner, I struggle with fit and have always gotten terrible chafing from packs bouncing regardless of “no bounce” promises-until now. The new Momentum can snug down perfectly, and is easily balanced with all of the front and back pockets. I’ve yet to run out of storage space, even with bottles, a rain jacket, gels, Khatoola spikes, a phone, extra mittens, socks, sunglasses, and a hat! It’s perfect loaded down for long winter trail runs, yet breathable and fitted enough that I don’t mind throwing it on in warmer weather for some extra fluid confidence. The new fit has it sitting so comfortably that you might even forget you’re wearing a pack, and saves your neck from that dreaded fatigue. I was a die hard Spry fan (from the OG Spry days!) and despite it also being an amazing pack, I so love the new Momentum that I gave my trusty old pack to a new runner in need of one. From 10 mile training run to 200 mile race, this is definitely my new favorite go-to.

  17. Robert Youngren

    Overall this is a very strong product. For most of my running I like going hands free, be ability to carry my phone, some hydration in the warmer months, and have ample storage for small items and possibly a lighweight jacket. Before I discovered UltrAspire my favorite minimal race vest was the UD OCR which I’m not even sure they still make? But, it too was a very lightweight, non-nonsense vest that was just enough of a pack to be usable.

    The Momentum 2.0 is a much better product in my experience. The construction and fit of the Momentum 2.0 is superior. There is enough space to fit that extra layer of clothing, your phone, keys, some gels and of course two Hybrid 550 bottles.

    The only thing that’s a bit strange to me is exactly how the magnetic bottle enclosures are intended to work. It seems obvious enough, but it seems like the bottles in place just don’t seem completely, confidently, secure. I’ve jostled the pack around pretty good on trails and I keep finding myself wanting to reach back to check to make sure the bottles are still there. Often it feels like the bottle has crept it’s way up the pocket and I need to push it back down. I’d recommend making the bottle pocket a bit deeper and simply have the magnetic enclosure system above the bottle level to ensure the bottle (or whatever you decide to stuff in there, I’ve stuffed heavy mittens in these pockets in leu of bottles) stays locked in the pocket. It’s easy enough to free the bottle (or other cargo) by flipping apart the magnetic enclosure. Basically make the bottle pockets a bit more utilitarian and not specifically for bottles.

    Other than that, I’ve no real criticism. It’s wonderful to have a vest that fits like a vest next to my body. This is the first time I’ve been able to wear a fully loaded race vest under a normal fitting jacket! This is something that’s crucial in winter time runs in deep cold where it’s necessary to keep your water from freezing and to quickly don a layer w/o having to remove your pack!

  18. Angelica Maria (verified owner)

    This is a solid, well-designed vest made for those of us who prefer not to drink our water out of a bladder. It’s lightweight and everything I carry in it (water bottles, keys, phone, snacks) feels secure. There was a slight learning curve to figuring out how to get the water bottles out and in smoothly while running, but I’d say by mile 5 of my first run wearing the vest I’d gotten it down.

    I’m giving this vest a 4 out of 5 stars only because the sizing is not quite universal. The sizing is unisex, which means that a men’s small and a women’s small are the same thing. I’m a woman, 5’4″ and 125 lbs, with a somewhat narrower chest. The small is still somewhat too large, and even though it’s adjustable the tightest it allows me to make the vest is still just a bit shy of how tight I need it to be for optimum comfort and security.

    Overall great product and I will buy from this company again.

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