Mountaineering Nylon Cordura tear-resistant nylon fabric, highly strong and durable Three-point hauling system: Two hauling points on both sides of the front of the backpack, together with the top handle, can form a three-direction hauling system. This enhances the stability during hauling in long-distance big wall climbing, where dragging equipment is required. FIT shaping fitting system, V-shaped aluminum rods combined with high-density one-piece EVA back panel, evenly distribute weight, provide strong support, reduce weight while bringing greater flexibility and comfort to climbing, and ensure unrestricted movement. Seperate waist belt for easy wearing of a safety harness. Built-in independent oxygen bottle compartment, suitable for high-altitude climbing with oxygen bottles, quick replacement. Front storage compartment, can hold ice claws. Left storage bag, can store avalanche/ice crevasse detection poles, trekking pole storage bags, etc. Built-in climbing equipment hanging rings for convenient access. Built-in water bag storage compartment, can accommodate a 3L internal soft water bottle. Multiple external attachment points on the top bag and front face. Zipper main bag and side zipper openings for quick storage and retrieval of items. Side compression straps with snowboard fixing device, specially designed for extreme climbing, reflective thread markers for night visibility. Bottom technical ice pick quick fixing device, convenient for loading. Belt tool loop and ice pick holder, can hang locks, ice picks and other easily accessible climbing equipment. Dimension: S-28x19x57cm, L-30x21x64cm Weight: S-1630g, L-1750g