For an ensemble that's city-style-worthy and casually smart, reach for a black overcoat and a tan turtleneck. For something more on the dressier end to finish off your ensemble, introduce olive suede loafers to the mix. Keep this combination in mind come warmer days, and we guarantee you'll save time racking your brain for an ensemble on more than one occasion. When it comes to dressing ideas for 40-year-old gentlemen, this look looks cool on most men.