Sale: $ MSRP: $


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The result of collaboration with ultra runner Scott Jurek, the Ultimate Direction SJ Ultra Vest offers the best weight-to-capacity ratio of any hydration pack on the market weighing a featherlight 7.5 ounces (13 with bottles) and offering 9.2 L of storage space for apparel, accessories and essentials. The SJ Ultra Vest packs dual 20 oz bottles in front for quick access to help keep you hydrated on the trails.

*Click 'Product Videos' below for more details; see Ultimate Direction Video Vault for more info about development and sizing.


  • Gunmetal/Red



  • 2 included 20 oz Bottles with Kicker Valve
  • Dual front bottle holsters with bungees hold bottles secure; also fits 26 oz Ultimate Direction bottles
  • Vest design distributes load for enhanced stability, comfort and easy access to items in front
  • Dual sliding, adjustable sternum straps let you dial fit and keep vest close to your body
  • Cuben Fiber fabric is 15 times stronger than steel and extremely resistant to moisture and UV
  • Hex Mesh is breathable, strong and lightweight; does not absorb moisture to keep vest light and allows for evaporation
  • Stretch Power Mesh at pockets keeps load compact and items stable
  • Soft Velvetex Banding prevents skin irritation
  • Rear Cuben Fiber pocket fits apparel or hydration reservoir (not included) with top hanging hook and dual side slots to run hose
  • Rear mesh zipper pocket for gloves, warmers or other accessories
  • 4 front hose loops allow you to run reservoir hose left or right, over or under arm
  • Rear exterior bungee cord lets you adjust volume of pack and stashes jacket or lightweight apparel
  • 2 front mesh chest pouches with velcro closure for gels or small accessories; fits small smartphone or camera
  • 2 rear lat side side zipper pockets stash small items
  • 4 mesh pockets on bottle holsters for gels and nutrition
  • 1 small water-resistant front velcro closure pocket under bottle holster for electrolyte caps
  • 1 small front velcro closure mesh pocket under bottle holster for keys or small valuables
  • Safety whistle attached to front via bungee
  • Trekking pole and ice axe loops
  • Hand-washable
  • Torso Length: 12 inches (30 cm)
  • Width: 9 inches (23 cm)
  • Weight: 7.5 ounces (13 ounces with bottles)
  • Pack Volume: 9.2 L


25 - 31" 31 - 38" 38 - 43"

*Measure in inches around fullest part of chest

Bottle Details

  • Unique medical grade silicone Kicker Valve allows for easy drinking that's easy on your teeth
  • To drink, pull up on valve, bite and sip; squeeze bottle to desired flow rate
  • 'Kick' valve to the side using teeth and it automatically returns to leakproof closed position
  • Off-center valve prevents need to tilt bottle straight up
  • Sealed leak-proof twist cap; large opening for easy filling
  • Finger loop makes for easier grab and return
  • Finger grooves improve grip while drinking on-the-run
  • Squeezable bottle is odorless and tasteless
  • BPA free; FDA/NSF approved safe Polyethylene bottle
  • Bottle and cap dishwasher safe on top rack
  • Weight: 2.8 oz (79.4g)

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Customer Reviews

Comments: Just took on 14 mile run.  Bottles were full, very little bounce if any. Plenty of capacity to hold gels, bars, keys, phone, etc. 
Water does slosh as consumed but becomes white noise after a while. Bag is super light.  I has some chafing under my arm wearing
sleeveless shirt- perhaps I need to adjust better. 
From: Harvey, Portland, OR