Something as simple as wearing a tan cable sweater and light blue ripped skinny jeans can potentially set you apart from the crowd. Bump up this whole outfit by rounding off with a pair of casual boots. During the winter season, when warmth is critical, it can be easy to surrender to a less-than-stylish outfit. However, this outfit is a shining example that you totally can stay comfy and remain stylish at the same time during the winter season. When it comes to casual style tips for 20-year-old gentlemen, this getup looks cool on almost any man.