Mammut's Lithium Crest 40+7 Backpack goes from overnight winter tours to summer weekends in the alpine with ease. Its Contact Vent V Frame combines breathable padding with the stability required for long approaches over rugged terrain. The back panel adjusts vertically to ensure a customized fit, and the top lid adjusts to accommodate more gear for longer adventures. Mammut made the Lithium Crest hydration compatible to pair with your hydration reservoir, and the detachable rain cover protects your gear from wet weather when needed. The bottom compartment stows compressed sleeping bags, and it's removable to reduce weight. There are gear loops for sleeping pads, carry loops for ice axes or trekking poles, and a plethora of pockets for smart organization.