Is there anything more universally classic, style-wise, than the trench coat? The perfect Spring coat is American preppy, but is embraced by the French ingenue, too. And if you don't already own one, it's high time you rethink. The belted, double-breasted style looks perfect on the laziest of weekend days, walking into the office, or worn over a formal gown (seriously — we've got the photo to prove it!). Scroll through for seven how-to-wear examples that'll get you through a full week.