Kitanica walks you through the various features of their VESPID 30L Backpack... "The VESPID pack is a great everyday carry solution. The pack’s four zipper opening allows three access modes: Top loading  - using just the lid, Front loading - using just the vertical zippers allows you to open the pack and access all gear inside without disturbing the contents and Full load - opening lid and vertical zippers “all the way” to expose the entire load.