The Black Diamond Blitz 20L pack is best suited as a lightweight climbing pack or more specifically as a summit pack. The description from Black Diamond and the video below gives a good description of the pack. "Designed with knowledge from years spent in the mountains, the Black Diamond Blitz is the answer for serious summit pushes, making it the ultimate on-route pack. With all the features of a summit pack, the new Blitz packs are constructed from our new BD UHWMPE “Mini Rip” 100d body fabric, giving them the ideal balance between being ultra-durable, hyper-light, and extremely packable. A one-handed top closure simplifies your system while keeping the elements out, and the strippable design adds even more weight savings, with a removable bivy pad. A color-coded red rope strap is easy to find, while the ice tool Pick Pockets™ have been updated with our new custom metal dogbone attachment for added ice tool security. Hydration compatibility rounds out the feature set for an on-route pack built for the send." Video Black Diamond Blitz Packs. Features BD UHWMPE “Mini Rip” 100d Nylon with 200d PE body fabric One-handed top closure Easily accessible, water resistant zip pocket on lid Strippable design with removable hipbelt, and frame sheet / bivy pad Color coded red rope strap Ice tool Pick Pockets™ with our new custom metal dogbone ice tool attachment Hydration compatibility Internal zippered pocket Raincover available separately Specification Material: BD UHWMPE “Mini Rip” 100d Nylon with 200d PE body fabric Volume: 20L Weight: 390g