One of the best ways for a man to style a denim jacket is to wear it with white jeans in a laid-back combination. For something more on the elegant end to finish off this getup, throw beige suede casual boots in the mix. Keep this getup in mind come spring, and rest assured, you'll save a ton of time getting ready on more than one morning. Guys wondering how to dress stylishly in your 40s, you have your answer.