When the setting calls for a refined yet knockout outfit, you can easily opt for a beige v-neck sweater and a dress shirt. Feel uninspired with this outfit? Invite burgundy leather oxford shoes to change things up a bit. This combination is an exciting idea when it comes to a knockout summer-to-fall ensemble. As a 30-year-old gentleman, you probably want to start dressing in a more elegant manner. That's when outfits like this become very relevant.