Putting together a beige cotton blazer with a white dress shirt is a nice idea for a dapper and refined getup. When not sure as to what to wear when it comes to footwear, stick to a pair of black leather derby shoes. This getup is a winning option if you're scouting for a great, summer-ready getup. Guys wondering how to sport classic and casual style as you make it through your 20s, you have your answer.