If you don't take fashion lightly, go for a smart menswear style in a tan dress shirt and khaki chinos. Finishing with dark brown leather loafers is an easy way to bring a bit of flair to this look. As you can see, this ensemble is a really good option, especially for transitional weather, when the temperature is dipping. Definitely a goofproof choice if we're talking fashion for 20-year-old gents.