Consider teaming a white dress shirt with tan pants to exude manly sophistication and class. Rounding off with a pair of black suede tassel loafers is the most effective way to add a bit of zing to this look. When it's one of those dull fall days, sometimes only a neat getup like this one can get you to face the outside world. All in all, a popular option if we're talking outfit ideas for guys in their 20s.