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Ultimate Direction Ultra 4.0 Hydration Vest


Item # ULD002O

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  • Signature Blue, S ($129.95)
  • Signature Blue, M ($129.95)
  • Signature Blue, L ($129.95)
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Item # ULD002O


Over the hill and across the ridge.

When your training runs take you up mountains, through valleys, and across ridges, you'll need the Ultimate Direction Ultra 4.0 Hydration Vest to keep you going mile after mile. With pockets for two water bottles, snacks, and a light rain jacket, the Ultra 4.0 carries everything you need without adding needless weight or bulk to your running kit. Fit is everything when you're running long distances, so Ultimate Direction gave the vest its Comfort Cinch system, which consists of two bungee-like straps along the back, that allows the fit to be quickly tailored to match your torso with a quick pull of the toggles.

  • Hydration vest keeps you fueled during long-distance runs
  • Front pockets keep water bottles within reach while running
  • Large back compartment carries an extra layer or two
  • Comfort Cinch system allows for on-the-fly fit adjustments
  • Trekking pole holder keeps hands free during steep scrambles

Tech Specs

Flex Mono Mesh, MicroMono Mesh, 30D nylon, 4-way stretch nylon, elastane blend
10.3L (629.7cu in)
Comfort Cinch
2 water bottle, 3 front drop-in, 1 zippered front, 2 hook-and-loop front, 1 zippered back compartment
Gear Loops:
back bungee cord
Trekking Pole Carry:
Recommended Use:
trail running
Manufacturer Warranty:



Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead


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
 S / MM / L
Chest Circumference

23 - 36in

(58 - 91cm)

32 - 44in

(81 - 112cm)

Ultra Vesta
 XS / SM / L
Chest Circumference

20 - 38in

(51 - 79cm)

24 - 40in

(61 - 102cm)

Fastpack 20, Fastpack 30, Skimo 8
 S / MM / L
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)

NOTE: Measure wearing the clothes you intend to wear. A vest full of gear will fit smaller.

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