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  • Ultimate Direction Race 4.0 Hydration Vest
  • Ultimate Direction Race 4.0 Hydration Vest 3/4 Back
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Ultimate DirectionRace 4.0 Hydration Vest

Item # ULD002N

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Item # ULD002N

Race day.

Months of intense training, dedication, and careful preparation culminate the moment you step up to the starting line. You've done your best to prepare for the miles that lie ahead, but you'll still need the necessary fuel and hydration to carry you through to the finish line, and that's where the Ultimate Direction Race 4.0 Hydration Vest comes in. Designed for the demands of race day, this vest implements a simple design that carries just the essentials—two water bottles, energy snacks, and those few extra items you've learned through experience are essential to finishing strong. The vest also features Ultimate Direction's Comfort Cinch system that allows the fit to be adjusted on-the-fly for a snug, secure fit from mile 2 to 24. 
  • Hydration vest designed for ultra marathons and trail races
  • Breathable mesh with four-way stretch for comfort while running
  • Comfort Cinch system allows for an adjustable fit on the trail
  • Front bottle holsters keep water within reach for easy access
  • Drop-in and zippered pockets stows snacks and small essentials
Tech SpecsSize
Tech Specs
Flex Mono Mesh, MicroMono Mesh, 30D nylon, 4-way stretch nylon, elastane blend
5.3L (324cu in)
Comfort Cinch
2 front water bottle, 4 front stretch mesh, 1 zippered front, 2 zippered back
Trekking Pole Carry
Recommended Use
trail running
Manufacturer Warranty

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.

Reviews & Community


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Perfect Long runs & short hikes

  • Familiarity: I've put it through the wringer

I'm an ironman triathlete and have tried everything to carry enough hydration for those 15+ mile training runs. I've finally found the goldilocks pack. Enough liquid for a 90-minute sufferfest in the desert of Arizona, and for humid summer runs in the northeast. No bounce, phone pocket in the back, cinches tight and "disappears" on your body until you get thirsty. Goodbye Fuelbelt, Ultimate Direction nailed it.

Most Breathable Vest

  • Familiarity: I've used it several times

The folks at BackCountry have been awesome in making sure I got a vest that fit just right. This vest is perfect for those hot runs when you need a little more breathability and little more hydration than a hand held. (especially if you sweat a lot) I found this vest to be perfect for carry 1 to 1.5L of water as well as all my nutrition. No need for anything bigger if you are planning to be out running for less than a full day or are doing a supported race with aid stations. Better fit and more breathability than the previous 3.0 version.