The Jansport Audion messenger bag makes life a little easier for riding bikes than most daypacks. To begin with, you can swing it around and dig through it while still rollin' on you bike, plus it has a built-in pocket for your tunes and a strap to attach your light. The cam-lock shoulder strap makes it easy to adjust on the fly and you can hook up the waist belt for hauling bigger loads across town. It has a padded laptop sleeve and enough secret stash pockets to hide your goods from the man.