Gregory Alpinisto 20L Backpack Alpineglow One Size. Specifications for Gregory Alpinisto 20L Backpack: Manufacturer: Gregory Size: One Size Gender: Unisex Fabric/Material: Nylon Features of Gregory Alpinisto 20L Backpack A turnkey alpine system designed to optimize your outdoor pursuits with quick transitions and easy access to ropes crampons ice tools and included helmet holder. The lightweight AirCushion back panel offers all-weather durability without sacrificing quick-drying breathable support and comfort Designed to endure all environments with lightweight durable materials aluminum hardware and redundant systems for smooth transition from approach to climb. Package Contents: Gregory Alpinisto 20L Backpack Gregory 157873-A790: Alpinisto 20L Backpack Alpineglow One Size