Boost Backpack - Men's by Black Diamond

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218020 Features: Move effortlessly via the ergoACTIV suspension system to active frame technology designed to move with you by incorporating floating shoulder straps, a free-moving hipbelt and a flexible aluminum frame Maintain an even, balanced load across both shoulders with SwingArm Shoulder Straps that move in sync with your stride Move unrestricted in any direction with Black Diamond's proprietary custom-shaped ball joint that attaches the hipbelt to the frame to a key to the ergoACTIV suspension Make natural movements to lightweight aluminum frame is built with a customizable, anatomical contour that enhances the ergoACTIV suspension's flexibility Stay a littler drier and fresher to soft 3D mesh on the hipbelt and shoulder straps and a vented backpanel promotes breathability and comfort Load and unload your pack with ease thanks to the top-loading design that features a fixed top pocket so you can keep important items at easy reach Keep your camera and multi-tool where you can easily reach them in the hipbelt stash pocket, and have your rain jacket, a hat and a water bottle in the side stretch pockets and front compression stretch pocket Pack is hydration compatible and employs trekking pole to ice axe loops Specifications: Capacity: 1950 cu in (Medium); 2075 cu in (Large) Weight (estimated): 2 lb 12 oz Fits torso: 185 to 215 inches (Medium to Large) Material: nylon ripstop Frame material: aluminum Access: top Number of pockets: main compartment + 5 pockets