Plenty of fashion trends come and go, but a classic trench coat is among the few that never seems to lose its appeal. Equal parts polished, practical and infinitely versatile, it’s the one layer that instantly makes even the simplest T-shirt and jeans combo feel more sophisticated. Celine Dion proved exactly that when she recently stepped out in Paris wearing a beautifully tailored trench, reminding us that fall outerwear season has officially arrived. Whether you prefer a timeless double-breasted silhouette, a cropped version for everyday wear or a modern update in denim or bold color, there’...