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Osprey Mutant 38 (Closeout) Climbing Pack



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Availability: In Stock!

Ships tomorrow.

Availability: In Stock!

Ships tomorrow.
Item # OSP16231M
A sleek option for ice climbing, fast-and-light alpinism, or ski mountaineering, the lidded Osprey Mutant 38 offers over 2100 cubic inches of storage capacity and an abundance of climb-friendly features at a minimal weight.
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A sleek option for ice climbing, fast-and-light alpinism, or ski mountaineering, the lidded Osprey Mutant 38 offers over 2100 cubic inches of storage capacity and an abundance of climb-friendly features at a minimal weight.

An aluminum support stay and a 1.2mm HDPE framesheet lend the pack lightweight structure and load-balancing stability. When you aren’t carrying as much weight or want to reduce the weight of the pack itself, you can remove both of those entirely. A spacer mesh backpanel cushions the load while offering breathability to help keep you cool. Padded shoulder straps enhance fit and load-hauling capability, as does a contoured hipbelt that can easily be pulled back and lashed against the pack itself 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 Mutant 38 accommodates torso lengths ranging from 15”-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 zipper pulls, dual ToolLocks with bungee tie-offs, front panel crampon attachment loops, and a removable helmet carry system. Other features include side compression straps, gear attachment points, a sternum strap safety-whistle, and a lined sleeve that makes the pack hydration system (sold separately) compatible.

The Osprey Mutant 38 is available in your choice of size and color options.

  • Quick release upper side compression
  • Removable one piece 15mm side compression straps
  • Reinforced A-frame ski loops
  • Removable helmet carry
  • Glove friendly zipper pulls
  • Dual ToolLocks with bungee tool tie-offs
  • Front panel webbing loops for crampon attachment
  • Removable dual compartment top lid
  • Integrated FlapJacket for weather protected lidless use
  • Reverse wrap hipbelt padding wings with gear loop and attachment points



Best Use Climbing, Mountaineering, Snow Sports
Access Top Loading
Warranty Limited Lifetime
Volume Small/Medium: 2136 cu in
Medium/Large: 2319 cu in
Type Climbing Pack
Sternum Strap Yes; Adjustable
Maximum Weight 50 lbs
Material 210d nylon ripstop
Item Weight Small/Medium: 2.51 lbs
Medium/Large: 2.65 lbs
Torso Adjustment n/a
Hydration Compatible n/a
Frame Material Aluminum
Fits Torso Small/Medium: 15"-19"
Medium/Large: 18"-22"
Fits Waist Small/Medium: 26"-45"
Medium/Large: 28"-50"
Dimensions 30" x 12" x 11"
Detachable Daypack n/a


Real Customer Reviews

Average Rating:
(based on 2 real customer reviews)

2 Items

nice pack
Reviewed by Steve D. - April 24, 2018

Likes: I like this pack it is well built and stable on my back.
the frame has a single stay for fitting that actually works well.
the slim design stays tucked behind you helping to ovoid snags along the way.

Dislikes: my only one dislike is the hip belt length. depending on your hip size and clothing thickness this belt may not be usable. I like using the belt to avoid pack bounce. maybe a belt extension would be possible solution if one exists.

Love it
Reviewed by Kurt D. - July 7, 2017

Likes: Integrated whistle in the osprey's sternum strap. Lots of gear loops. Big storage for size.

Dislikes: Pretty much one big compartment like a duffel bag

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