Osprey Nimsdai Mutant 90 Litre Mountaineering Pack

OspreySKU: 10247210449S/M

Price Match
Size: S/M
Colour: Tungsten Grey
Sale price$499.95


No mountaineering pack has been put to task quite like the Nimsdai Mutant 90. Created for Nepalese mountaineer Nirmal "Nims" Purja MBE and his team for their historic 2020 winter ascent of K2, one of the world's most demanding mountains, it pushes the limits of what an alpinist's pack is capable of.

With the same attention to safety and comfort as the rest of the Mutant series and a massive capacity for gear, conquer the world's greatest peaks with superior fit, form and function. 

Special Edition

Created for Nepalese mountaineer Nirmal "Nims" Purja MBE and his team upon a historic 2020 winter ascent of K2.


Alpine-Specific Features

Dual ToolLocks, rope carry, snowshed backpanel, glove-friendly buckles and strippable features.



Developed and tested by athletes on the first winter ascent of K2.


Safety First

A narrow profile, close-to-body carry and Osprey's superior fit makes for efficient and ultimately safer movement in the mountains.

Other Features

  • Removable top lid with zip pocket; FlapJacket and stowaway pocket
  • Two under-lid rope attachments, adjustable webbing strap
  • Snowshed fabric backpanel
  • Two-buckled ice-tool attachment slots
  • SR-buckled upper and lower side compression straps for bulky item attachment.
  • Removable helmet carry net
  • Dual deep side wand/snow-picket pockets
  • Front foam-reinforced shield pocket for crampons or snowshoes
  • Dual side ski attachment loops
  • Reinforced gear attachment loops
  • Lightweight, glove friendly buckles
  • Strippable features for minimal carry
  • Internal hydration sleeve

Carry Information

Backpanel Harness
  • 4 mm LightWire frame
  • Snowshed fabric
  • Ridged EVA foam
  • Stretch woven mesh over EVA foam

Load range: 9-27kg

Size Volume Dimensions Weight
S/M 88 L 81H x 42W x 33D cm 2.03 kg
M/L 90 L 86H x 42W x 33D cm 2.11 kg


Main: bluesign® approved 210D recycled nylon grid NanoFly®, PFAS-free DWR

Accent: bluesign® approved 210D recycled high tenacity nylon, PFAS-free DWR

Bottom: bluesign® approved 600D recycled high tenacity nylon, PFAS-free DWR

Contact us within 30 days of receiving your goods to request a refund or exchange if products are eligible (see: Return Policy).

All packaging or products must be in their original, re-sellable condition.

Outlet sales are final and can only be returned for exchange. Items found faulty or under warranty will be replaced or refunded.

Some special condition products are labelled as No Refund & Exchange Products. Sale of these items are final and are not eligible for neither refunds nor exchanges.

For safety reasons, K2 cannot accept returns on climbing equipment, socks, underwear and some other products unless faulty.

Please check out our refund policy if you need more information.

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