Osprey Mutant 38 Pack

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When the summit is in sight and every ounce counts, customize the alpine-focused Osprey Mutant 38 to make it even lighter and sleeker. It's perfect for quick or multiday ascents in harsh conditions.


  • Aluminum stays and an inner framesheet create a lightweight suspension system that handles loads up to 50 lbs.
  • Remove any of the following to reduce weight: top lid, framesheet and aluminum stays, helmet carry, rope attachment strap and side compression straps
  • Removable top lid has an integrated FlapJacket™ below to protect your gear from the elements during the final push
  • Carry your helmet on the top or the front of the pack
  • Reinforced A-frame ski-carry loops work in conjunction with compression/retention straps to provide stable ski carry
  • Side compression straps (lower) and quick-release side compression straps (upper) pull the weight in close
  • Dual ToolLocks\™ with bungee tie-offs provide quick and easy access to your ice tools
  • The padded, EVA foam hipbelt with integrated gear loops and attachment points features reverse-wrap hybrid technology designed specifically for use with climbing harness
  • Rope attachment and internal compression keeps your gear in check
  • Glove-friendly buckles and zipper pulls are easy to operate when your hands are protected
  • Internal hydration sleeve fits up to 3L reservoir (sold separately)
  • 3 reinforced haul loops provide simple, secure 3-point hauling capabilities
  • Front panel daisy chain for additional gear attachment
  • When you set the bag down, the Snowshed fabric backpanel won't get embedded with snow like many mesh backpanels


View all Osprey Backpacking Packs

Technical Specs

Best Use



Frame Type

Internal Frame


Body: 210-denier nylon; bottom: 420-denier nylon

Frame Material

Framesheet with aluminum stays

Number of Stays


Reservoir Compatible


Pack Access


Number of Exterior Pockets

1 + main compartment


29 x 13 x 12 inches



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