Product Search
Product Search
Take 20% Off a Full Price Item
Join our FREE Inside Edge Program!Details
Sold Out Item # OSP1B401M

Osprey Mutant 52 Climbing Pack

Purchase Mutant 52

You Save


Please select product options to add to your cart.
100% Satisfaction Guaranteed
Shop with Confidence.

Osprey Mutant 52 Climbing Pack

By Troy

Enwild Gear Specialist

The Enwild Difference

Real People
Real People
Connect and #HikeRunRoam with us!
Awesome Gear
Awesome Gear
Get the inside edge on the outdoors.
Amazing Service
Amazing Service
Because you deserve it.
A large-capacity option for ice climbing or mountaineering, the Osprey Mutant 52 backpack has more than 3000 cubic inches of storage and an abundance of climber-friendly features.


A large-capacity option for ice climbing or mountaineering, the Osprey Mutant 52 backpack has more than 3000 cubic inches of storage and an abundance of climber-friendly features.

Aluminum support stays and a framesheet lend the pack lightweight structure and load-balancing stability. When you aren’t carrying a heavy load and don't need as much support or just want to reduce the weight of the pack itself, you can remove the stays and/or the framesheet entirely. A laminated EVA backpanel cushions the load and is exceptionally durable. Padded shoulder straps enhance fit and load-hauling capability, as does a contoured hipbelt that can be removed entirely for ease of use when you’re wearing a climbing harness. Load-lifter straps and an adjustable sternum strap further ensure a proper fit. The Small/Medium size of the pack accommodates torso lengths ranging from 16”-19” and the Medium/Large best fits 18”-22” torso lengths.

The top-accessed main packbag has a protective lid that can be removed entirely to reduce the weight of the pack. Dual compartments in the lid aid in gear storage and organization. An integrated FlapJacket panel pulls forward to protect the packbag if and when you choose to leave the lid behind.

There are also an abundance of climbing and alpine features like reinforced A-frame carry ski loops, glove-friendly buckles, dual ToolLocks with bungee tie-offs, gear loops and ice gear attachment points on the hipbelt, dual side gear pockets, and an integrated helmet carry system, and a three-point haul system. Other features include side compression straps, front panel gear attachment points, a sternum strap safety-whistle, and a lined sleeve that makes the pack hydration system compatible (system sold separately).

The Osprey Mutant 38 climbing pack is available in your choice of size options.

  • Removable HDPE sheet and two aluminum stays form V support
  • Laminated EVA harness
  • Removable contoured EVA foam hipbelt with stretch woven with gear loops and ice gear clip attachment
  • Snowshed fabric backpanel
  • Dual ToolLocks with bungee tie-offs
  • Front panel daisy chain for additional gear attachment
  • Three-point haul system
  • Internal hydration pocket
  • Glove-friendly buckles
  • Removable top pocket
  • Helmet carry
  • Integrated FlapJacket with stowaway pocket
  • Reinforced A-frame ski carry
  • Dual side wand/ice pro pockets
  • Quick release upper side compression straps
  • Lower side compression straps
California residents: view proposition 65  Warning

Technical Specs

Best Use
Climbing, Mountaineering, Snow Sports
Top Loading
Detachable Daypack
Item Dimensions
29" x 13" x 13"
Fits Torso
Small/Medium: 16"-19"
Medium/Large: 18"-22"
Frame Material
Aluminum stays and removable HDPE framesheet
Hydration Compatible
Maximum Weight
50 lbs
Sternum Strap
Yes; Adjustable
Torso Adjustment
Small/Medium: 3051 cu in
Medium/Large: 3173 cu in
Limited Lifetime
Climbing Pack
210D High Tenacity Nylon body, 210D Nylon Honeycomb accents, and 420D Nylon Packcloth bottom
Item Weight
Small/Medium: 3.24 lbs
Medium/Large: 3.41 lbs

1 Reviews

5 / 5


Earn Gear Points For Reviewing Products

Join our FREE Inside Edge program and receive 20% off a full-price item. Earn discount points for reviewing items you purchase and receive exclusive discounts.

What are points?
As a member you can share reviews of items you purchase and we'll reward you with discount points valued at 5% of the item's original purchase price. It's EASY and it's FREE.

Sign Up Today
Sort By



The Mutant is a Beast


I just used the Mutant on a 7 day/6 night trip (did a backpacking loop with some scrambling, no climbing) and it's by far my favorite pack so far, compared to the Osprey Aether, Gregory Zulu, and Granite Gear Blaze, all very good packs. My starting pack weight was 43 lbs and it was extremely stable, balanced, and comfortable, even on steep sidehilling, bushwacking, and boulder hopping. It will fit a Backpacker's Cache bear can (the black one) but I did not use a can on this trip, so I can't comment on how well it fits with the rest of my gear. Impeccable attention to detail was put into the design of this pack. Everything is in the right place and works the way it should. It's very easy to remove the floating lid and hip belt, which I did for a couple of dayhikes, and the side compression straps allow this pack to be cinched down very nicely when not carrying your full load. I also really appreciate how the hip straps are not obnoxiously long, thank you Osprey! I'm 5'-6", 165 lbs, had my torso measured at 17", and got a size Small/Medium which is 50L and it fit my body frame as well as all of my gear perfectly. I can't comment on durability after only one trip, but my initial impression is that it's made extremely well and should hold up to years of use and abuse.


This is a nitpick, but I really wish there was a little mesh pocket on the bottom side of the rainflap that's under the floating lid. I understand howthe flap is designed to be tucked away when the lid is attached, and a mesh pocket might not work in reality. But if I had to find one thing that was missing from this pack, that's it. Not a deal breaker in any way.