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Item # ULD001G

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Item # ULD001G

Goes the distance, and then some.

Maintain a blistering cadence during grueling races and intense training efforts with the Ultimate Direction Marathon Hydration Vest. This streamlined hydration vest holds a two-liter reservoir within its main compartment, and it also sports dual bottle holsters for greater hydration capacity during the longest runs of the season.

Adjustable sternum straps support the pack so it won't jostle around at speed. Cool Wick Mono Mesh shoulder straps maintain exceptional breathability to reduce sweat build-up. There's a zippered pocket large enough for the iPhone 6, which is especially handy if you're tracking your running stats with a GPS-based app or listening to music. Plus, there's a front-stretch pocket for storing your keys and cash.

  • Cool Wick Mono Mesh straps
  • Adjustable sternum straps
  • Holds 2-liter reservoir (not included)
  • Dual water bottle holsters
  • Zippered pocket (holds iPhone 6)
  • Front-stretch key pocket

Tech Specs

180g PowerSpan Mesh, Velvetex Edge Binding
Shoulder Straps:
Cool Wick Mono Mesh straps
Hydration Compatible:
yes, dual bottle holsters, yes, accommodates 2-liter reservoir (not included)
2-liter hydration reservoir pocket, 1 front-stretch, 1 zippered front (holds iPhone 6)
12.2 x 8.7 x 4.1 in
Claimed Weight:
4.9 oz
Recommended Use:
running, hiking & camping
Manufacturer Warranty:

Size chart

Ultimate Direction

Packs & Vests
SJ Ultra Vest 2.0
Chest Circumference 23 - 33in
(58 - 84cm)
31 - 36in
(79 - 99cm)
36 - 44in
(91 - 112cm)
AK Race Vest 2.0, PB Adventure Vest 2.0
Chest Circumference 23 - 36in
(58 - 91cm)
32 - 44in
(81 - 112cm)
Ultra Vesta
Chest Circumference 20 - 38in
(51 - 79cm)
24 - 40in
(61 - 102cm)
Fastpack 20, Fastpack 30
Chest Circumference 24 - 40in
(58 - 91cm)
32 - 46in
(81 - 112cm)
Torso Range 15 - 19in
(38 - 48cm)
18 - 21.5in
(45 - 55cm)
One Size
Chest Circumference 29 - 46in
(74 - 117cm)
One Size
Chest Circumference 25 - 41in
(63.5 - 104cm)

Reviews & Community


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Exceeded Expectations

  • Familiarity: I've put it through the wringer

I purchased this vest to use in the Spartan Race World Championship at Lake Tahoe. Through 14 miles and 35 obstacles it held up, and helped me to finish in the top half of the world's best obstacle course runners. A week later I used it again to run the Steamtown Marathon and in the process qualified for the Boston Marathon. The product was great, light but durable, and very functional. Looks great too! And the customer service at Backcountry was 2nd to none! Thanks Sam!!