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Take on full multi-day fastpacking missions with the Ultimate Direction Fastpack 40 — a 40L vest-style pack with class-leading weight-to-capacity for serious backcountry runs.

DESCRIPTION

The Fastpack 40 is the biggest pack in the range and the one to grab when you genuinely need to disappear into the mountains for a few days. The volume is real — 40L swallows a bear canister vertically, a quilt, a shelter, layers, food and water for multiple days — but it carries closer to a 25L pack on your back because of the running-vest harness. Two flasks ride up front, shoulder strap pockets keep snacks and your phone in reach, and the roll-top plus full-length side zipper means you can pull the one thing you need without unpacking the whole load. Behind your shoulders, the Infiknit™ seamless harness with FastFlow™ ventilation moves air across your back through long, sweaty hauls, and at 715g, the pack itself isn't what's slowing you down.

If you're committing to a full Drakensberg Grand Traverse, planning a multi-day Cederberg link-up, or building base for an unsupported FKT attempt, this is the pack. It also handles 100-milers with extensive mandatory kit when a 30L just won't close. Pack ultralight — base weight under 7kg — and the Fastpack 40 runs. Pack it like a hiking pack and it'll punish you. For shorter trips, look at the Fastpack 30; for women's-specific fit, look at the Fastpackher 30 V2.0.

TECH SPECIFICATIONS

  • Capacity: 40L (41L precise)
  • Weight: 715g (1.60 lbs / 25.2 oz)
  • Reservoir compatible: Yes, not included
  • Back panel: Infiknit™ seamless harness with FastFlow™ ventilation
  • Closure: Roll-top main compartment plus full-length side zipper
  • Pocket configuration: 15 exterior pockets — 2 front bottle pockets, multiple shoulder strap pockets, 2 side stretch pockets, large rear stretch pocket
  • Fabric: MonoRip mesh and high-tenacity ripstop body
  • Bear canister compatible: Yes, fits BV500 vertically
  • Trekking pole carry: Yes, dedicated bungee attachment
  • Sizes: S/M and M/L (chest measurement)
  • Cut: Unisex
Size
Color
Spruce