One of the coolest ways for a man to style such a practical item as a beige shirt jacket is to team it with a white sweatshirt. Add a pair of olive canvas high top sneakers to the mix to make a classic ensemble feel suddenly fun and fresh. Keep this outfit in your head come warmer weather, and we promise you'll save time racking your brain for what to wear on more than one occasion. If you often wonder how to dress as a guy in his twenties, this combination is a never-failing option.