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

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

Osprey Packs Mutant 38 Backpack - 2136-2319cu in


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    • Dyno Green
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    4 Reviews


    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

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

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Great lightweight pack

    • Familiarity: I've used it several times

    I bought this as a spring ski mountaineering pack, but spring was over so I didn't try it for that yet. Just tried it for hiking so far. It is super light. There are a few things I wonder about. There is almost no padding on the waist belt and the water hose just comes out from a hole. That should be fine in the spring but if I tried to use this in the winter the hose might freeze. I really need to load it up with full gear including skis, crampons, ice axe, to see how it carries. I know they had to cut some features to lighten it up. I like the high usable to unusable feature ratio. I also have a Kode 42 and that pack could lose a bunch of features I don't need (board carrying straps, back side full zipper, etc) and get a lot lighter and still be just as functional for me. The Mutant has most features I need (ski carry, helmet sling, hole for water bladder etc) without a bunch of stuff I don't need. I am giving it a 4 because if it had waist belt padding I think it would be just about perfect.

    Fantastic do-it-all pack

    • Familiarity: I've used it several times

    I have carried mine on a 3 week trip through Europe, and backpacking trips in the Sierras. It's been great for both things.
    I really like the flap that goes over when one removes the top pocket. I've carried up to 30#, and it handles it well. It appears to be durable, though I haven't done any hauling with it yet... Overall I'm very impressed.

    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.