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VaporKrar 4L 2.0 Hydration Vest

4.4894 out of 5 stars
47 Reviews

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VaporKrar 4L 2.0 Hydration Vest

You can't stand bringing water with you on a run, but when you're running a summer ultra even you can admit that your stubborn minimalism needs to take a trip to the back burner. For seriously long runs from humid Northeast forests to scorched desert dirt, put on the Nathan VaporKrar 4L 2.0 Hydration Vest to make sure you stay safely hydrated through your most challenging days.

Depending on the length of the run you're prepping for, you can choose to fill the included 20 oz soft flasks with water, as well as add your own 1.5-liter hydration bladder for extra reassurance. The design focuses heavily on maintaining a breathable, shirt-like fit that won't slosh and bounce for hours on end, so don't feel like you need to skimp on water to preserve your sanity. The soft flasks also come with extended straw tubes so you can sip without removing them from their pockets. Even though you'll have friends waiting with more exciting junk food at aid stations in your race, having a store of easy-to-access energy gels is crucial when you're training, and the VaporKrar's wealth of pockets give you plenty of room to stash as much as you need.


  • Minimalist hydration vest to keep you going on ultra-long runs
  • Apparel-like fit moves with you comfortably and breathes well
  • Included soft flasks feature extended tubes for hands-free drinking
  • Compatible with a 1.5L hydration bladder on your longest runs
  • Front stash pockets provide quick storage for energy gels
  • Zippered chest pocket keeps your phone secure on rugged trails
  • 360-degree reflectivity keeps you visible in low-light conditions
  • Item #NAT004F
4L (244cu in)
Hydration Compatible
two 20oz soft flasks, 1.5L bladder
Reservoir Included
[flasks] yes, [bladder] no
1 zippered chest, 1 zippered back, 6 front stash
Claimed Weight
[without soft flasks] 7.3oz, [with soft flasks] 11oz
Recommended Use
road running, trail running
Manufacturer Warranty