Model Number:

Based upon inspiration from the the Ultimate Direction Signature Series race vests, the Fastpack 20 is a streamlined, stable pack with features and capacity for multi-day run adventures, or day-long treks where you need to carry more gear. The main compartment forgoes zippers in favor of a waterproof roll top closure, allowing the pack to tightly secure everything from 15 to 23 liters. Front pockets can carry bottles, nutrition and small accessories, or you can stash a reservoir in the rear (bottles or reservoir not included).


  • Spruce Green (SPR)


61 - 101 82 - 117

*Measure in centimeters around fullest part of chest


  • Infiknit harness; seamless back panel and shoulder strap system to prevent abrasion and discomfort
  • Large, main roll-top compartment expands from 15L to 23L; top loading with velcro closure, no zippers
  • Rear stretch-mesh pocket with low-profile daisy chain system
  • Water bottle compatible front pockets; fold flat to store other items (bottles not included)
  • Dual adjustable sternum straps and side straps for stability and custom fit
  • Integrated side compression Z-straps for varying load capacities
  • Removable foam back panel for comfort
  • Water-resistant
  • Reinforced bottom panel for extra durability
  • Low-profile daisy chains with trekking pole and ice axe loops
  • Pack Volume: 15L - 23L (915 - 1403 inches³)
  • Weight: 1 lb 3 oz (535g)
  • Dimensions: 20" x 11.75" x 9.5" (51 cm x 30 cm x 24 cm)