Features Material: [body] 210D nylon, 420D high-density nylon, [base] 630D high-density nylon, [lining] 210D nylon Volume: 2929 cu in Support/Suspension: Fusion Flex, 7075-T6 aluminum stay, HDPE framesheet Shoulder Straps: dual-density foam Waist Belt: yes, removable Description Product Description As the biggest offering in Gregory's Alpinisto lineup, the Alpinisto 50 Backpack is the ideal gear hauler for those more gear-intensive ascents and overnight summit bids. The basic rucksack design is optimized for alpine climbing and is supported by Gregory's Fusion Flex suspension system to keep the pack comfortable when you're hauling heavy loads of food, gear, and rocks (hey, training is important) up the mountain. When saving weight and covering serious vert take precedence over comfort and support, the framesheet, single aluminum stay, top lid, and hip belt can all be removed from to trim an additional pound and a half from the pack's total weight, which adds up over long distances (you'll save of full ton of lifting over 1,300 steps, if that helps put things in perspective). Gregory rigged the front of the Alpinisto with a front crampon pocket, dual ice axe attachment points, and dual ski carry straps, so you'll easily be able to carry all the gear you need whether you're ice climbing, mountaineering, or ski touring. There's also zippered hydration pocket, rope straps and haul loops for climbing trips, and a sled-pull attachment on the hip belt to make it easy to tug gear behind you on long approaches and hut trips.