The Alta Rise 45 backpack with the +6 revolution gives you the option of increasing or decreasing the size of your equipment with a simple zip movement, without it suffering. So if you need more gear or personal storage space, you don't have to change bags. The ALTA RISE 45 is comfortable to carry and features an ergonomic, breathable Air System back system and harness, as well as a sturdy top carry handle that allows you to grab and go quickly at any time and hang the bag from a hook.