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Mammut says 

The ideal partner for climbing, ski tours, and mountaineering, this versatile pack serves up lightweight comfort and exceptional durability for year-round alpine pursuits. Water-repellent and abrasion-resistant, our full Trion line was developed with pro alpinists Stephan Siegrist and Nico Hojac to optimize every last detail. Made of primarily recycled materials, the Trion 50 offers ample space and a host of practical features, including ice axe attachments, practical back access to the main compartment, and a designated avalanche equipment compartment. Complete with contact back system for optimal load transfer, you can stay fully focused on the next move ahead.