Messenger bags are fabulous for school, work, day trips or any time when you need a moderate amount of storage space and a laid back urban style. They hold flat items, such as books, notebooks and laptops especially well and they make it uncomplicated to grab your items without taking your pack off. Many have distinguished organization pockets for items such as pens and cash. Some can be attached to a bike as panniers, for easy cycling storage. There are also waterproof options that protect your gear in menacing weather. Phenomenal brands include Timbuk 2, Dakine, Arcteryx and Mission Workshop.