You'll be surprised at how easy it is for any guy to pull together this off-duty outfit. Just a navy denim jacket and a white crew-neck t-shirt. Brown leather derby shoes are the simplest way to bring an extra dose of polish to this getup. As this combination proves, you can't think of a better option for summer. So if you're on the lookout for style inspo for dressing as you pass the big four-oh, this combination is definitely worth saving for later.