If you want take your casual game to a new height, wear a black crew-neck t-shirt and chinos. Now all you need is a pair of white leather low top sneakers. During winter, when comfort is a must, it can be easy to settle for a less-than-stylish look. However, this look is a shining example that you totally can stay toasty and remain equally stylish in winter. And if we're talking casual style for 20-year-olds, this look looks cool on most gentlemen.