It doesn't matter how old we are: The beginning of September will always remind us of heading back to school, and our shopping choices will be guided accordingly. (Fancy stationery? Yes, please! Trim, tweedy blazers? Sign us up!) So we're grateful that today there are so many chic backpacks that are actually suitable for adults—because we're a little too old to be revisiting the Lion Kingversion we toted through grade school.