This is the perfect small, portable back pack. I wear it on my bike when running errands and I love the chest and belt straps that hold it in place. It's not as big as a school pack, so it's easy to port around when you don't have to carry a ton of stuff. It has great little pockets everywhere that are convenient for my ID card, chapstick, money, phone, and bike lock (yes, all separate pockets. Plus it's super cute!
Chanda recommended this style