For a look that's nothing less than Bond-worthy, pair a white denim jacket with grey dress pants. Complete this outfit with dark brown leather loafers and off you go looking killer. You'll always look stylish even despite the oppressive heat if you keep this ensemble in your front hall closet. As a 30-something Millennial gent, you probably want to start dressing in a dressier manner. In this case, getups like this are ideal as inspiration.