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Designed with ultra running standout Anton Krupicka, the Ultimate Direction AK Race Vest is the minimalist's take on hydration with a close fitting stretch vest shape and dual 20 oz bottles in front for easy access. Weighing a scant 6 ounces (10 oz with bottles), the AK Race Vest still has plenty of capacity for nutrition, apparel and essentials; a versatile design for any run from 10 to 100 miles.

*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
  • Dual side compression straps help dial-in fit
  • 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
  • Large 4L capacity rear stretch mesh pocket for apparel, gloves, warmers or larger items
  • Rear pocket fits hydration reservoir (not included) with top hanging hook and dual side slots to run hose
  • 4 front hose loops allow you to run reservoir hose left or right, over or under arm
  • Rear exterior bungee cord stashes jacket or 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
  • 2 small front velcro closure mesh pockets under bottle holsters for electrolyte caps, keys or small valuables
  • Hand-washable
  • Torso Length: 12 inches (30 cm)
  • Width: 9 inches (23 cm)
  • Weight: 6.0 oz (11.5 oz with bottles)
  • Pack Volume: 4.5 L


23 - 34" 27 - 39"

*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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