Handbag trends are taking a turn for the luxe this fall, though a busy girl favorite remains prevalent for the season—backpacks. No longer exclusive to middle-school students, a sleek pack slung over your shoulders is a pragmatic alternative to totes and carryalls. The key to ensuring grown-up vibes? Choosing styles that employ structure and elegant details (namely forgo the key chains, buttons and patches). From minimalist to bohemian to embellished, here are 15 sophisticated backpacks for every style and budget.