Display your prowess in men's fashion in this casual combination of a raincoat and grey jeans. To give your overall getup a more refined spin, why not complete this outfit with a pair of dark green leather loafers? So as you can see, it's extremely easy to look amazing and stay comfortable come colder weather, thanks to this ensemble. Those who are curious how to rock semi-casual dressing as you move through your teenage years, you have your answer.