Opt for a grey overcoat and chinos for a neat polished look. Introduce a pair of brown casual boots to the mix for extra style points. During the winter months, when warmth is top priority, it can be easy to surrender to a less-than-stylish outfit. This outfit, however, is a clear example that you can actually stay comfortable and remain equally stylish in the winter months. All in all, an ideal example of semi-casual style for teen boys.