Designed with input from world-class ultra runner Rob Krar, the Nathan VaporKrar 4L race vest offers a close, chafe-free fit and incorporates two 12 ounce soft flasks with extended drinking tubes for optimal on-the-go hydration.
The lightweight, breathable and moisture-wicking fabrication of the vest hugs your body to ensure a movement-mirroring fit and a bounce-free carry. Strategically drilled vents allow warm air to escape and help to keep weight to a minimum. Without the flasks, the vest weighs just 6.4 ounces! Dual sliding sternum straps and lateral side straps let you dial in fit without getting in the way or causing undue pressure.
Innovative ExoShot Flasks ride up front in dedicated stretch harness pockets. Extended drinking tubes allow you to access water without ever having to remove the flasks from the pockets. Integrated “spines” give the flasks just enough structural support to hold their shape without being overly rigid or adding excess weight. Locking caps and bite valves ensure leak-proof performance and a high flow rate. The simple elastic design of the harness pockets does make the flasks easy to remove and put back into the pockets for refills and cleaning at the end of your run.
Streamlined lateral pockets and a rear main pocket combine to offer 244 cubic inches of storage. An internal pocket is compatible with Nathan’s 1.5L Vapor hydration bladder (sold separately). Small stretch stash pockets on the harness and dual vertical zippered harness pockets provide additional options for stowing gels, electrolytes, a cellphone, or other essentials. Reflective hits increase low-light visibility.
The Nathan VaporKrar 4L running vest is available in four sizes. The Small best fits 30”-32” chest sizes, the Medium best fits 36”-38”, the Large best fits 39”-41”, and the Xlarge best fits 42”-44”.
- Equipped with two 12oz ExoShot soft flasks, with extended straw tubes to easily sip fluids without removing flasks from the front pockets
- Apparel-like fit with a lightweight, breathable structure
- Front storage for soft flasks, nutrition, smartphones sized up to iPhone 6 Plus, and other essentials
- Adjustable sternum straps attach for maximum flexibility and personalized comfort
- Rear main pocket with internal bladder pocket is compatible with Nathan’s 1.5L Vapor hydration bladder (sold separately)
- Multiple stash pockets for on-the-go access to essentials
Best Use Running/Fitness Access Panel Loading Warranty Limited Lifetime Volume 244 cu in Type Hydration Running Vest Sternum Strap Yes; Two adjustable Item Weight 6.4 oz w/o flasks
10.4 oz w/ flasks
Torso Adjustment n/a Hydration Compatible Yes; Two 12oz ExoShot soft flasks included Detachable Daypack n/a
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