This combo of a navy blazer and a white and navy vertical striped dress shirt is the picture of class. Rev up the dressiness of this outfit a bit with a pair of brown suede derby shoes. So if it's an extremely hot summertime day and you want to look on-trend without putting in too much work, this outfit will do the job in no time flat. In search of fashion for 30-year-old men? This pairing is definitely worth saving to your favorites.