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  • Nathan VaporKrar 12L Hydration Vest
  • Nathan VaporKrar 12L Hydration Vest 3/4 Back
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NathanVaporKrar 12L Hydration Vest
Sale 40% Off$107.97 $179.95

Item # NAT003E

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Item # NAT003E

Training partner.

If you're getting serious about this ultra thing, you're going to need a better hydration system than hanging onto a water bottle in one hand. Combat dehydration and the plethora of unpleasant side effects that come with it while you train for your upcoming race with the Nathan VaporKrar Hydration Vest. Focusing on minimalism and a bounce-free design, the VaporKrar will keep you cool and comfortable while you stay hydrated from 20-mile training runs to your 50-mile race.

Whether you're heading to Leadville or to a smaller, local race in your neck of the woods, the VaporKrar's airy synthetic construction will serve you well in any summer race. It has the contour fit of an active shirt and is designed to move with you and wick moisture as you run. Before you go, fill the multiple pockets and 1.8-liter bladder with as much fuel, hydration flasks, and water as you need; its compression straps lock down and streamline the load so that you don't spend 50 miles listening to your gear jostling around on top of you, and instead are free to enjoy the inspiring scenery around you.

  • Stay hydrated in your next ultra with this streamlined vest
  • Stretchy, breathable fabric moves with you as you run
  • Compression straps and tailored fit limit bouncing
  • Front pockets fit iPhone 6 Plus and plenty of run fuel
  • Rear sleeve holds onto included 1.8 L hydration bladder
  • Reflective accents help you stay visible on late runs
Tech SpecsSize
Tech Specs
12L (732cu in)
adjustable sternum straps
Hydration Compatible
soft flasks, 1.8L bladder
Reservoir Included
1.8L Vapor hydration bladder
front, back
multiple stash, 1 front zippered, 1 rear zippered
Recommended Use
Manufacturer Warranty


Hydration Vests
 XSS / ML / XL

30 - 32in

(76 - 81cm)

33 - 38in

(84 - 97cm)

39 - 44in

(99 - 112cm)


25 - 30in

(63 - 77cm)

28 - 33in

(71 - 84cm)

31 - 36in

(79 - 91cm)

34 - 40in

(86 - 102cm)

How to Measure:
Measure 3" below underarms at the widest part of your chest, keeping the tape a bit loose.

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The future of packs.

  • Familiarity: I've used it several times

I had tried previous Nathan packs for running and I found that they kept the weight compacted into one area, and did not disperse the weight much and that led to the pack moving around a whole lot. They solved that problem by utilizing this design that operates more like a vest than a traditional pack. You can cram this thing full and it will still be stable and secure on your back, and all the while be super comfortable. Love the material it is made of and it just looks and works great.

Nathan hydration systems

    I was skeptical about this hydration system as I have several camel backs and they are useless for running being that they bounce around to much. After running with Nathan’s 12L system I was pleasantly surprised at the fit and stability of the set up. The hose has a magnet which makes it super easy to access. I use to stash water along my routes on long runs but I no longer get have the need with this system. The backpack also has reflective material on it making it visible at night as well as several pouches on the shoulder straps to hold nutrition packets or your ID. Little pricey for this set up but overall it’s been a great investment if you are running over 10 miles in the heat. 5 stars for sure.