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The updated UltrAspire Fastpack is comfortable and gets lighter with sweat proof webbing and more breathable mesh while still boasting loads of storage for gear, quick-access pockets for nutrition or accessories, and dual 26 oz bottles for self-supported ultra running events or multi-day expeditions. A unique rear strap holds this pack close without inhibiting natural motion; front sternum and waist compression straps help secure the ride as the contoured vest shape evenly distributes weight to eliminate pressure points. A handy front magnetic pocket stores electrolyte capsules you'll need to go the distance.


  • Aero Red/Grey (RE)

Vest Details

  • Includes 2 Human26 oz ergonomic bottles
  • Sweat proof webbing prevents pack from absorbing moisture and getting heavier as you run
  • Larger holes in mesh enhance breathability to keep you cool while also decreasing pack weight
  • 2 side rear ergo angled bottle holsters for quick grab and return of hydration on-the-run
  • 2 large rear pockets for extra apparel, accessories and compact sleeping gear; can also accommodate a hydration bladder (not included)
  • Rear quick access outer pocket with buckle closure for compact apparel, warmers or gloves
  • Contoured vest shape for a comfortable fit that doesn't inhibit range of motion
  • Evenly distributes load; reduces pressure points
  • Adjustable sternum and waist speed hook straps secure fit, no snap buckles
  • Body Rhythm Harness™ rear strap allows limbs to move freely while still keeping pack secure
  • Rear easy-access stretch pocket with magnetic closure for lightweight shell jacket, warmers or accessories
  • 2 small mesh waist pockets on each side for small essentials or nutrition; 1 zippered, 1 open
  • Front right stretch mesh pocket for gels or bars, large enough for additional water bottle
  • Front left mesh pocket and zipper pocket to stash small accessories or nutrition
  • Top zipper pocket for headlamp, phone, keys, nutrition or other small essentials
  • Magnon Electrolyte Pocket™ with simple magnet closure on right strap for electrolyte capsules
  • Lightweight zippers with pull tabs; grab easily even when wearing gloves or with cold fingers
  • Torso Length: 21 inches (53.3 cm)
  • Pack Volume: 1,000 inches³ (16.39L)
  • Weight: 31 oz (880 g) with empty bottles

Bottle Details

  • Human26 oz, ergonomic angled bottles
  • Finger loop makes for easier grab and return
  • Leak-proof, push/pull nozzle
  • Fills easily with wide mouth opening
  • Crystalline™ plasma silicon oxide coating for better taste, easier cleaning and durability; FDA approved
  • Polarity system™ magnet at bottom
  • Low Density Polyethylene (LDPE) construction
  • BPA free

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