Go superlight or supportive.
Gregory's Alpinisto 35 Backpack is a technical pack designed for climbers, alpinists, and ski mountaineers. Its Fusion Flex suspension system consists of a single aluminum frame stay, stable HDPE frame sheet, and dual-density padding along the shoulders and hips to keep the pack comfortable when you're hauling heavy loads. When reaching the summit means you'll have to shed weight, the stay, framesheet, and hipbelt can all be removed to trim an additional pound-and-a-bit from the pack, which adds up when you're putting away 4,000 vertical feet in a single mile.

The Alpinisto has a traditional top-loading design, but Gregory threw in a side zipper for added convenience when you need quick access to waterproof layers. There are slots, straps, and pockets for skis, climbing ropes, ice axes, crampons, ice clippers, and more climbing gear. Better still, this pack also has a hydration sleeve with a locking zip hose port to help protect the hose from freezing up, sled pull loops on the hipbelt for easy gear hauling, and compression straps to lock your load when the Alpinisto isn't stuffed to the brim.

Fusion Flex suspension
Removable framesheet and stay
Top and side access
Removable bivy pad and hipbelt
Hydration compatible (reservoir sold separate)
Dual ski slots and ice axe attachment
Front crampon pocket
Sled pull loops on hipbelt
Side compression straps
Item #GRE006E

Material[body] 210D nylon, 420D high-density nylon, [base] 630D high-density nylon, [lining] 210D nylon
Volume35L (2136cu in)
Support/SuspensionFusion Flex, HDPE framesheet, 7075-T6 aluminum stay
Shoulder Strapsdual-density foam
Waist Beltyes, removable
Hydration Compatibleyes
Reservoir Includedno
Accesstop, side
Pockets1 main, 1 top, 1 front crampon
Gear Loopsyes
Helmet Carryyes
Ice Axe Carryyes
Trekking Pole Carryyes
Compressionyes
Weight Capacity35 lb
Claimed Weight2 lb 4 oz
Recommended Usealpine & expedition, climbing, ski touring
Manufacturer Warrantylimited lifetime