The great design of this backpack is difficult to capture with pictures, so order one, see it in person, and you will not be disappointed. I commute by bicycle, and this is the greatest backpack I have ever owned. It would be very difficult for me to go back to a traditional style backpack. This pack is not only comfortable, but it will not move around or slip like a traditional backpack can do while bicycling. It also allows for a greater range of motion in the shoulders/upper arms, which makes for not only a more comfortable bicycle ride, but a safer one too. My hands can move much more freely on the handlebars, which makes it much easier to grab the brake levers in panic stop situations. Thank You!