Momentum Race Vest (New UltraViolet Colorway)

(19 customer reviews)


A super stripped down versatile race vest with the capacity to hold all your essentials. The Momentum race pack comes with hydration pockets in the back, mesh storage pocket for your race apparel or rain gear, and plenty of easy access pockets in the front for cell phones, nutrition, F250 flask, and any of the other items you need to grab quickly on the go.




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.
• Magnon pocket for sweat-free pills, with automatic magnetic closure for rapid access to pills and other 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 (31”-36”) MD (34”-39”) LG (37”-42”)
Color:  Pitch Black
Hydration Compatible (not included):  4 x UltraFlask 550
Weight: 7.2 oz (204 g)

Additional information

Weight 0.45 lbs
Dimensions 14 × 10 × 3 in

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Fluid Capacity

4 x 550 mL UltraFlask (Sold Separately)

Total Volume

300 c.i. (5 L)



Product Weight (lbs)

19 reviews for Momentum Race Vest (New UltraViolet Colorway)

  1. Bree

    Love this vest. My go to for 2018. Comfortable and functional with everything I need in a pack . Perfect fot short to longer distance trail races. I love the material and it’s machine washable.

  2. Jordan

    I’ve trained in the Spry for years and this is a perfect step up in storage. I can bring anything I need in a very light weight comfortable package.

  3. Joel Hatch

    For the summer of 2018 I wanted the “Magic Unicorn” of hydration packs. I wanted a pack that could be descrete in training but also expand to carry all the essentials in a longer race. The Momentum Race Vest is that “Magic Unicorn”.

    The sleek and compact design of the Momentum Race Vest is perfect for longer training runs where you’ll want to carry a large phone, soft flasks, and possibly a quesadilla incase you get really hunger mid run. Yep, you can load the vest up with all that “essential gear” and the vest will not have an ounce of bounce.

    The pack really shines when you are pushing the miles and the pace. I used it during the Twisted Fork 64km trail race in June. With just 3 drop bag aid stations for the race, I loaded the pack with two 500ml soft flasks in the front pockets, a 550ml UltraFlask in the rear pockets, and loads of gels. I love that I can access both my flasks and nutrition from the front of the pack! The Max02 Sternum straps keep the vest bounce free and did not restrict my breathing during those nasty climbs in the second half of the race.

  4. Rebekah

    Hard to pick a favorite but I think it’s the Momentum. Up to now, I have loved, loved, loved my Alpha Pack- and still do. But the Momentum has some added features while retaining some of the best of Alpha. Plus, it feels smaller on my frame- which is a good thing!

    The vest is a true vest; no side straps to wrangle with. The fabric is light and breezy mesh. The two rear pockets hold bottles (or anything else you want). Today a 550 flask rode back there. No bounce at all and very comfortable. Later on in the run, I put one of the flasks in the front and left one in the back. My phone was in the other front pocket. Still felt very balanced. I was impressed.

    I have previously used the softflasks with straws in the front. Equally terrific ride.

    There are also two stretchy snack pockets on the side. Just the right size for gels, bars, baggies of food etc. THe back zip pocket keeps whatever is in there secure and safe, and the straps for poles could also be used to stack a jacket.

  5. Larry A. McFarland (verified owner)

    This an exceptionally well-designed vest. Not only does it come with the functionality that you except from UltrAspire products but the fit is perfect – even heavily loaded it rides very lightweight. No straps to tug, tuck or manage. The interchangeability of use between the rear holsters and front main pockets gives you many, many loading options.

    The only drawback (and it isn’t really one as this is a lightweight model after all) is that you cannot carry a bladder if you wanted to .

    A superior product overall!!

  6. Aaron

    Perfect vest. This is the first race vest I’ve ever used, but I can’t find any reason to try another one. The vest is light and comfortable and everything is easily accessible on the go. FIts everything I need for longer runs without being cumbersome.

  7. Nolan Blanco

    The Momentum vest is an incredible offering from UltrAspire. It is a piece of gear that is hard to leave at home when going for any length run. It can be a minimalist vest with plenty of options to store your phone, a soft flask, Ultraflask or Human 20 bottle and nutrition. And if you are a packrat, there are four huge pockets, two in the front and two in the back, that you can pack it down with enough water and food to be self sufficient on those longer days when training for an ultramarathon. With two Human 20 2.0 bottles in the back and food in the front, I get ZERO bounce! And it still has room for a light weight shell for those “just in case” moments. If you need versatility… the Momentum is a great choice!!

  8. Barry Tonkin

    This vest is the business. From the first second I tried it on you could just feel the thought that went into creating it.

    The minimalism of the vest is incredible considering how much you can fit into it, and how versatile it can be.

    Zero bottle bounce and the tight fit with out feeling constricting make it a dream to run in.

    From training runs to ultras this vest just ticks all the boxes.

  9. Alexander Humenetskyj

    This vest is perfect for race day. My Momentum holds all I need and then some (be sure to watch the video to see just how much you can carry). It’s a race day must have. I also like that it has 4 bottle holders– perfect for 20 mile long runs. Pleasantly surprised with its durability, fit, and comfort. Hugs you in all the right places. Zero bounce. Well done, UltrAspire!

  10. dj.crites14

    I was in the market for a vest option that was lower volume then the Zygos 2.0 but more volume then the Speedgoat waist belt. Then this year UltrAspire enters the Momentum into their vest ranks. Since it came out I had my eye on it waiting for reviews or a video to give a better visual on what the product looked like or performed liked. (Beyond the photo’s provided that is.) When I finally was able to have the product in hand I was excited at how lite the vest really was!! Extremely breathable with the overall honeycomb style framing within the mesh. So for warmer runs this was a huge pro for the vest.
    I love the placement of the pockets and the fact the vest has “4” pockets practically the same. I love this feature because the pack will be customized to each race with the max water options being 4, 550 flasks or just stuffing all the pockets with fuel and using a hand held!
    When I put the vest on at first seemed tight/form fitting due to it’s minimal design. Once I ran in it, my view changed. Due to the lite frame nature of the vest and having it fit closer to the body this allowed for a great fit with the weight of a flask in the front pockets. I understood the reasoning behind a more form fitting vest.

    The only CON I have with the vest is that I do not have monkey arms and can not reach the back two pockets if I were to place to backup bottles. Now this is just personal because I know some individuals may be able to do this no question’s asked. For me I have to take the vest off mid run and switch my empty flask with the full flask.

    Personally I can look past this issue because number one I love the vest. However to some this may be frustrating. And for that I give the product a 4.8 out of 5 stars.

    I am 5′ 11″, 198lbs with a 42″ chest. and the Large fits perfect for me.

  11. Giff

    I got this vest thinking I would only use it as a lightweight/hot weather vest with soft bottles up front but was pleasantly surprised to discover how versatile this vest is. The hex mesh is comfortable, stays dry and conforms really well to my body. I didn’t plan on using the rear bottle pockets but have found that they ride really nicely, are easy to access and feel much more balanced near my center of gravity than soft bottles up front do on technical terrain. For really long self-supported efforts I will use all four bottle options and can go 20-30 miles with ample water and fuel. The minimal footprint keeps you cool on hot days, the black looks great and you can load up the pack with a hat, glove and layers for colder runs. This has quickly become my go-to pack for racing and training. Get one!

  12. Jen

    I love this vest! It is very comfortable, no bounce and versatile. I can go more minimalist for shorter adventures or carry 4 bottles for longer ones. I have the violet and love the color. You can’t go wrong with this vest!

  13. Aaron

    Great vest! It has so little bounce that you can weigh it down with everything you need for a long effort or strip it down for whatever you need on a shorter run. The mesh is light and breathable. I love having four bottles, as opposed to a bladder because I can keep track of my fluid intake and carry both water and tailwind.

    My only, very small suggestion is that UltrAspire put rubber around the ends of the elastic pulls where you keep your trekking poles. Sometimes they clink on poles, which can range from distracting to annoying depending on how long you’ve been running. Other than that, it’s the best.

  14. David

    Loving this vest to switch from hydration bladder to bottles. I use a soft bottle in the front and 2 of the Ultraflask 550 bottles in the back. Perfect for quick refilling and gauging hydration during an ultra. I put my phone in the other front pocket, store a jacket and light in back pocket, and nutrition in the side pockets. With all of that loaded up it’s still comfortable and lightweight.

  15. andrealowrey (verified owner)

    My favorite vest! Perfect for short and long runs. Very light weight with lots of storage. No bounce or movement. No rubbing issues. My favorite part is all the pocket options. I live in Alaska so the front pocket is perfect size for my bear spray. So versatile!! Highly recommend.

  16. Becky Rogers

    I have over a dozen packs and this ultraviolet Momentum is the pack I always reach for. The side pockets are perfect for easy and fast access to items such as nutrition or gloves. The sizing enables me to find a perfect fit. I love the extra pockets in the back for additional hydration or fuel. The storage capacity of the zipped compartment is ideal for racing up to 100k.

  17. Steve (verified owner)

    Great vest! This is my first running vest. I have a Nathan hydration belt that couldn’t carry enough water for longer distance training runs in the summer hear and humidity. I’ve used it on just one 18 miler so far (2k elevation) and it was grand! No bounce, no chafing, and using two 550 flasks in the back pouches plus some bottles I stashed ahead of time on my route, it worked perfectly. I will admit it was mildly tricky to get the bottles back in, since they sit rather high on one’s back, but I developed a two handed technique that did the trick. I went with the snazzy purple because so much workout clothing is boring in color. I have not tried bottles in front yet. The vest did not feel hot in any way, though it was not a particularly warm day out.

    I love it’s LIGHT WEIGHT and ability to carry lots of liquid without relying on a hard to clean reservoir. Get it. Do it!

  18. Front Ranger

    This vest blows away the competition. Great for training or racing its build and features rival packs twice its price. Ultraspire for the win.

  19. Lori (verified owner)

    I’ve been a runner over 45 years, always used ‘fanny pack’ water bottle holders. They have become uncomfortable and I’m thrilled I found this vest! It holds all I need for my New Mexico high desert runs/hikes.

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