Osprey Nimsdai Mutant 90 litre Climbing Backpack

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No mountaineering pack has been put to task quite like the Osprey Nimsdai Mutant 90L Climbing Pack. 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. This streamlined pack is built to deliver superior load carry and exceptional stability for the most demanding alpine objectives in the world.

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. Osprey's commitment to performance doesn't compromise on sustainability—this pro-level pack is constructed with bluesign® approved recycled fabrics, delivering excellent durability in a lightweight and low-impact package.


  • Removable top lid with zip pocket
  • FlapJacket and stowaway pocket
  • Under-lid rope attachment, adjustable webbing strap
  • 4 mm LightWire frame
  • Snowshed fabric back panel
  • Ridged EVA foam
  • Stretch woven mesh over EVA foam
  • Dual ToolLocks
  • Lightweight, glove friendly buckles


Weight: 2.1 kg


  • S/M: 88 L
  • M/L: 90 L

Dimensions: 86H x 42W x 33D cm

Materials: Bluesign® approved 210D recycled nylon grid NanoFly, PFC/PFAS-free DWR