This sophisticated combination of a blue waistcoat and a long sleeve shirt will be a good demonstration of your sartorial chops. Let your expert styling truly shine by rounding off your look with brown leather loafers. When it's one of those dreary fall days, sometimes only a knockout ensemble like this one can get you out the door in the morning. Ideal to convey that even as a 20-year-old gent you're confident enough to own your style choices.