Osprey Mutant 52 Mountaineering Pack

Built for alpine climbing, mountaineering, ski missions and technical objectives, the Osprey Mutant 52 combines a stable, close-to-body carry with the durability and features needed for demanding days in the mountains.

Its narrow profile keeps the pack streamlined on steep terrain, while dedicated attachments for ice tools, skis, rope and a helmet make organising technical gear easy. Glove-friendly buckles and a snow-shedding backpanel are designed specifically for cold alpine conditions.

The removable top lid lets you strip weight when moving fast, while the FlapJacket™ keeps the main compartment protected when the lid is removed.

Key Features & Benefits

• 52L alpine capacity – ideal for mountaineering, climbing, winter trips and lightweight multi-day missions

• 9–23kg load range for carrying technical alpine equipment

• Close-to-body, narrow profile for better stability and freedom of movement on technical terrain

• Atilon framesheet with dual aluminium stays provides support under heavier loads

• Snow-shedding backpanel with ridged EVA foam for comfort in cold and wet conditions

• Dual ToolLocks™ with bungee tie-offs for ice axes and technical tools

• Integrated rope attachment and internal compression

• Removable helmet carry net

• Reinforced A-frame ski carry

• Dual hipbelt gear loops and ice gear attachment

• Daisy chain loops compatible with Voile straps for additional gear

• Three-point haul system

• Internal hydration sleeve

• Glove-friendly buckles

• Removable top lid with zip pocket and FlapJacket™

• Made with durable bluesign®-approved recycled fabrics

• Developed and tested with athletes and mountain guides

Who Is It For?

The Mutant 52 is designed for mountaineers, alpine climbers, ski mountaineers and experienced backcountry userswho need a technical pack capable of carrying climbing and winter equipment without unnecessary bulk.

Specifications

Capacity:
S/M – 50L
M/L – 52L

Weight:
S/M – 1.462kg
M/L – 1.542kg

Dimensions:
S/M – 71 × 35 × 30cm
M/L – 76 × 35 × 30cm

Load Range: 9–23kg

Harness: Stretch-woven mesh over EVA foam

Main Fabric: 210D recycled high-tenacity nylon, PFAS-free DWR
Accent: 210D recycled nylon grid NanoFly®, PFAS-free DWR
Bottom: 450D recycled polyester, PFAS-free DWR

FAQs

Is the Osprey Mutant 52 suitable for mountaineering?
Yes. It is specifically designed for alpine climbing and mountaineering, with dedicated ice-tool, helmet, rope and ski carrying systems.

Can you carry skis on the Mutant 52?
Yes. It features a reinforced A-frame ski carry system.

Can the top lid be removed?
Yes. The top lid is removable to reduce weight, with Osprey's FlapJacket™ providing protection when the lid is removed.

Does it have a hydration sleeve?
Yes. An internal hydration reservoir sleeve is included.