A navy double breasted blazer and white chinos are absolute must-haves if you're picking out an elegant closet that holds to the highest sartorial standards. White suede derby shoes are the most effective way to bring a hint of sophistication to this ensemble. If you're in search of a summer-ready outfit, this one is a great pick. As a gentleman in his thirties, you probably want to start dressing more maturely. In this case, inspiration like this comes in useful.