Go for a white vertical striped dress shirt and blue jeans for both seriously stylish and easy-to-style getup. Tan suede desert boots integrate perfectly within many ensembles. During the winter season, when practicality is imperative, it can be easy to settle for a less-than-stylish look. However, this look is a stark illustration that you can actually stay warm and remain stylish in the winter season. All in all, an ideal example of casual style for guys in their 20s.