Flex Trail 40-60L



Explore like a pro no matter your experience level. The Flex Trail 40-60L ultralight backpack gives you the ability to tailor the pack size to your adventure needs by taking advantage of its horizontal gussets. Cinch it down to a 40L cargo pack capacity for your shorter trips, then expand it out to 60L for your longer backpacking adventures. Continue to customize your backpack with the hardware-based adjustable torso. Keep your essentials close at hand with oversized mesh pockets and zippered hip pockets. The aluminum perimeter frame suspension keeps this backpacking pack lightweight while the support stays strong.


Sierra Designs
39-56L / 2380-3417 cu in
2 lbs 12 oz / 1.23 kg
Torso Fit:
15.5 - 21 in / 39 - 53 cm
Hip Fit:
31 - 54 in / 31 - 54 cm
Dimensions (H x W x D):
27.5 x 10.5 x 14 in / 70 x 27 x 35 cm
150D Polyester Ripstop / 420D Polyester
Other Features:
  • Expandable volume to adjust to both short and longer backpacking adventures
  • Lightweight aluminum perimeter frame for increased stability
  • Customizable fit with a hardware-based adjustable torso
  • Large front stretch mesh Shove-It pocket to easily store jackets and other day essentials
  • Zippered hip belt pockets and 2 stretch mesh side pockets for storing water bottles and items you need to keep on hand
  • U-shaped access to top zipper and zip stash pocket in lid to store items for easy access
  • Hydration reservoir sold separately

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