This backpack just arrived today and couldn't be happier. I am a cyclist and normally carry my wallet, car keys, and various small tools in a small fanny pack. Although adequate, the fanny pack had a tendency to slide low on my back and had to be constantly readjusted for comfort. Enter the ful Ditty Mini Backpack! Not only is it the perfect size, it's well-made and has a LOT of room in all its compartments for just about anything you'll ever need. In addition to the above stuff mentioned, this has plenty of room for sunglasses, cell phone, digital camera, spare tubes, and a host of other things. Once the straps are properly adjusted, you hardly know you're wearing it. Do yourself a favor and get one of these packs for the convenience it offers and the amount of stuff you can comfortably carry along in your travels.