Infuse style into your current casual fashion mix with a grey overcoat and a tank. Rounding off with a pair of black leather tassel loafers is a surefire way to bring an extra dose of style to your outfit. If you're looking to keep warm during the cold months and look on-trend while doing so, this getup is for you. And if we're talking casual clothing for 20-year-old guys, this getup looks great on most guys.