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  • Osprey Packs Mutant 38 Backpack - 2136-2319cu in Gritstone Black
  • Osprey Packs Mutant 38 Backpack - 2136-2319cu in Dyno Green

Available colors

  • Osprey Packs Mutant 38 Backpack - 2136-2319cu in Gritstone Black
  • Osprey Packs Mutant 38 Backpack - 2136-2319cu in Dyno Green

Osprey Packs Mutant 38 Backpack - 2136-2319cu in

sale $119.96 $159.95 25% off

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    5.0 5 1

    1 Review


    Climb like a mutant.

    High on a ridgeline, winds swirling around your perch, the stability of your pack and gear is of paramount importance—that's why a pack like the Osprey Mutant 38 Backpack is so important. Support and stability come in the form of a removable HDPE framesheet, a removable aluminum stay, and an AirScape back panel that also ventilates as you climb. This top-loading pack features a removable floating top lid to lighten your load for summit day. When removed, you can protect and secure your gear with the FlapJacket closure system. 

    To help you haul everything you need, Osprey added its Mutant Dual ToolLock ice-tool system that lets you securely carry, and remove, tools when needed. Side compression straps let you secure your load if it's not quite full, and the A-frame ski carry makes sure that you can get down off the top the fun way. To help keep you from overheating on the way up you can store your helmet in the removable helmet-carry system up top.

    • Reverse wrap hybrid EVA foam hip belt
    • Removable 1.2mm HDPE framesheet
    • Removable aluminum stay
    • AirScape back panel
    • 35-50lb optimum load range
    • Top-load access
    • Removable floating top lid
    • Nylon and polyester
    • FlapJacket closure
    • Internal hydration sleeve fits up to 3L bladder (reservoir not included)
    • Zippered top pocket
    • Zippered mesh pocket under FlapJacket
    • Mutant Dual ToolLock ice-tool system
    • Integrated gear loops on hip belt
    • Side compression straps
    • A-frame ski carry
    • Removable helmet carry system
    • Item #OSP003D

    Tech Specs

    nylon & polyester
    [S/M] 2136 cu in, [M/L] 2319 cu in
    removable 1.2mm HDPE framesheet, removable aluminum stay, AirScape back panel
    Waist Belt
    yes, Reverse wrap hybrid EVA foam hip belt
    Hydration Compatible
    yes, internal sleeve, up to 3-liter
    Reservoir Included
    1 zippered top pocket, 1 zippered mesh pocket
    Gear Loops
    yes, hip belt
    Helmet Carry
    yes, removable stretch mesh
    Ice Axe Carry
    yes, Mutant Dual ToolLock system
    yes, removable side
    Rain Cover
    yes, FlapJacket
    Weight Capacity
    35 - 50 lbs
    [M/L] 25 x 11 x 10 in
    Claimed Weight
    [S/M] 2 lbs 7 oz, [M/L] 2 lbs 10 oz
    Recommended Use
    alpine & expedition, mountaineering
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

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    It's an Osprey...

    • Familiarity: I've put it through the wringer

    I have become a cheerleader for Osprey and I'm slightly impartial. Their packs are always feature rich, comfortable, and protected by the best warranty in the business. I own three packs from Osprey (including this one) and I've had to use the warranty twice. It is true what they say; it will get fixed for free (even if your dog chews on it like mine).

    I bought this pack for multi-pitch and alpine climbing for its removable frame, compression straps, and features (like the awesome helmet holder). I love it so much that it is now my day-pack for hiking and may even get used for ultralight overnight trips. Highly recommended!

    What size will fit an 18" torso? It looks like the size chart is slightly out of date for this model. The newer versions is only offered in two sizes instead of three.