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Ultimate Direction Mountain 4.0 Hydration Vest

Item # ULD002P

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  • Signature Blue, S ($154.95)
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Item # ULD002P


Well-prepared for what lies ahead.

Stock the Ultimate Direction Mountain 4.0 Hydration Vest with all the water, snacks, and extra layers you need for a full day of running up steep trails and traversing high alpine ridge lines. The vest's Comfort Cinch technology consists of two bungee cords that can be quickly pulled or loosened to adjust the fit of the vest for a snug, secure, and bounce-free fit. Throw a pair of water bottles in the two front pockets for convenient access to water while you run, and be sure to throw some emergency essentials in the two side pockets so you don't find yourself miles from the nearest trailhead without the necessary emergency equipment to get yourself out when things don't go as you'd planned.

  • Running-specific vest hauls the necessary gear for long trail runs
  • Comfort Cinch system provides a customizable fit
  • Front hydration pockets keep water bottle within reach
  • Side loops secure trekking poles while climbing and scrambling
  • Zippered back compartment is large enough to carry a rain shell
  • Zippered side pockets offer additional storage space for emergency gear

Tech Specs

Flex Mono mesh, MicroMono mesh, 30D nylon, 4-way stretch nylon, elastane blend
13.3L (813cu in)
front panel
2 front water bottles, 4 drop-in front, 1 zippered front, 2 zippered side, 1 drop-in back
Trekking Pole Carry:
bungee straps
Claimed Weight:
9.24oz, [with bottles] 12.7oz
Recommended Use:
trail running
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
 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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Unanswered Question

Are the chest straps can be slided up and down?