Loving how this combo of a tan double breasted blazer and a navy turtleneck instantly makes a man look dapper and elegant. To introduce some extra flair to this outfit, introduce a pair of dark brown leather tassel loafers to the mix. With the departure of winter come warmer days and more sunlight and the need for a breezy look just like this one. If you're wondering how you should dress as a 30-year-old man, this combo gives a good idea.