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Superlight, incredibly durable, comfortable - the Arc'teryx Alpha SL 23 is a summit pack that doesn’t compromise. Sized for final pushes and minimalist approaches, it’s made from proprietary Hadron™ LCP (liquid crystal polymer) grid fabric - a proprietary material redefining the standard for lightweight durability. Access to the main compartment is fast and simple, and smaller pockets - one internal, one on the lid - hold small essentials. It packs easily into a larger pack, dual dog bones secure your tools, and an integrated system securely carries your rope.