Marrying a waistcoat and grey vertical striped dress pants is a guaranteed way to infuse your styling repertoire with some masculine refinement. Don't know how to round off? Complement this look with a pair of brown derby shoes for a more relaxed twist. This one is a nice option when it comes to crafting a standout ensemble for unpredictable fall weather. Perfect to show people that even as a 20-year-old man you're confident enough to make your own fashion choices.