This combo of a grey overcoat and a black cardigan is irrefutable proof that a simple look can still be really interesting. Puzzled as to how to complement this outfit? Wear a pair of black leather oxford shoes to dial up the style factor. During the winter months, when warmth is crucial, it can be easy to settle for a less-than-stylish ensemble. This ensemble, however, proves that you totally can stay snug and remain equally stylish in the winter months. This combo illustrates how 30-something guys succeed in the style department.