For a casually dapper outfit, reach for a tobacco overcoat and charcoal jeans — these items play really well together. Inject an added touch of polish into your look by slipping into a pair of dark brown leather chelsea boots. It's a viable pick if you're figuring out a well-coordinated outfit for unpredictable fall weather. Think it's hard for 20-something guys to nail smart casual looks? This pairing will prove you otherwise.