For an outfit that's city-style-worthy and effortlessly neat, make a shirt jacket and khaki chinos your outfit choice. Go ahead and complete your look with a pair of mint athletic shoes for a more laid-back touch. Keep this combo in your front hall wardrobe come warmer days, and rest assured, you'll save a lot of time trying to pick out what to wear on more than one occasion. A cool, less conservative combo for gents in their 20s.