Wear a white crew-neck sweater with tobacco chinos for a laid-back kind of sophistication. And if you wish to effortlessly dress down your look with a pair of shoes, introduce white athletic shoes to the mix. During the winter season, when comfort is paramount, it can be easy to surrender to a less-than-stylish look in the name of functionality. But this look is a clear example that you can actually stay comfortable and remain equally stylish in the winter season. This outfit illustrates how to kill in the casual fashion department as a 20-year-old gent.