evo.com | Arc'teryx Day Packs > When every gram counts on your alpine mission, the Arc'teryx Alpha FL 20 Backpack keeps things light and mighty with ultra-tough Hadron fabric that laughs at rough rock and nasty weather. The streamlined design sports smart features like a bungee compression system and ice tool attachments, while padded straps ensure comfort during those final pushes to the summit. 315d Hadron(R) AC^2 Nylon with Hadron(R) Light, ultradurable, and waterproof. 57cm Length x 27cm Width x 18cm Depth Internal Security Pocket External WaterTight(TM) Zippered Pocket with Key Clip Lightly Padded Thermoformed Shoulder Straps Durable, light, and comfortable. | Arc'teryx Alpha FL 20 Backpack 2026 - Regular in Gold | Nylon