You could toss on your trusty ribbed black beanie and call it a day—but a scarf (be it silk, woven, or cashmere) makes for a functional yet intriguing outfit that stands out from the crowd.

Go for soft fabrics like silk or cashmere—they drape better and won’t feel bulky. No need for fancy knots. Just let it hang over your suit, or casually toss one end over your shoulder. The less effort ...