Your most committing alpine rock and ice pursuits demand a pack that's up for the challenge. The Osprey Mutant 52, with its dialed-in features and expansive capacity, is here to answer the call. Tested and developed by local guides and athletes in some of the harshest conditions, the Mutant 52 has evolved into a formidable mountaineering pack for big objectives. If you're planning to spend days in alpine conditions and high elevations, you need the comfort, stability and capabilities of a Mutant. New colors, advanced fabrics and refined features make the latest iteration even more formidable than its predecessor. The whole Mutant family benefits from the addition of lightweight, recycled NanoFly® and robic fabrics for impressive durability and lower environmental impact than virgin materials.