Osprey Mutant 38

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small medium large
Weight 2 lb 13 oz / 1.27 kg 2 lb 14 oz / 1.30 kg 2 lb 15 oz / 1.33 kg
Stripped weight 2 lb 0 oz / .91 kg 2 lb 1 oz / .93 kg 2 lb 2 oz / .95 kg
Capacity 2100 cu in / 35 L 2300 cu in / 38 L 2450 cu in / 41 L

Where to Buy

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Manufacturer's Description

Visit Osprey's Mutant 38 page.

Retailers' Descriptions

Here's what other sites are saying:

The results of extensive testing and feedback from the vertical world, the Osprey Mutant 38 provides a simple, strong, lightweight solution for short alpine adventures or multi-day mountain trips.

- CampSaver.com

The Osprey Mutant 38 pack is a simple, strong and light solution for short alpine adventures or multiday mountain trips. It's the direct result of testing and feedback from around the vertical world.


Icy peaks, long mixed routes, and big walls test your physical and mental abilities, but the Osprey Mutant 38 Backpack cleverly complements your alpine ambitions in any season so you don't have to test your patience as well. The Mutant's 38 liters (medium) gives you enough space for a lightweight overnight expedition, but can be trimmed down for ultralight summit attempts thanks to the removable frame sheet and included bivy pad.

- Backcountry.com

On Sale. Free Shipping. Osprey Mutant 38 Pack FEATURES of the Osprey Mutant 38 Pack Removable dual compartment top pocket with spindrift collar Three-point haul system Dual ToolLock for leashless ice tool attachment Wand / ice-pro pocket Z-style side compression with top quick release Under lid rope compression strap Removable 3-fold EVA bivy pad and HDPE framesheet New Dual ToolLock for leashless ice tool attachment Built-in hipbelt Fixed Stretch Comfort Harness Adjustable sternum strap with safety whistle buckle Contoured EVA Hipbelt Reverse wrap stowable ErgoPull closure Ice clipper loops SPECIFICATIONS of the Osprey Mutant 38 Pack Matrix 420D nylon 315D Cordura nylon 420HD nylon 900D polyester Dimension: (H x W x D): 31 x 14 x 11in. / 80 x 35 x 29 cm The SPECS for Small Volume: 2136 cubic inches / 35 liter Weight: 2 lbs 13 oz / 1.28 kg Weight: Stripped: 2 lbs / 0.91 kg The SPECS for Medium Volume: 2319 cubic inches / 38 liter Weight: 2 lbs 5 oz / 1.33 kg Weight: Stripped: 2 lbs 1 oz / 0.93 kg The SPECS for Large Volume: 2502 cubic inches / 41 liter Weight: 3 lbs 2 oz / 1.42 kg Weight: Stripped: 2 lbs 2 oz / 0.95 kg OVERSIZE ITEM: We cannot ship this product by any expedited shipping method (3-Day, 2-Day or Next Day). Even if you pick that option, it will still go Ground Shipping. Sorry for being so mean.

- Moosejaw