To assemble a casual outfit with an urban spin, you can easily go for a crew-neck t-shirt and charcoal skinny jeans. A pair of black athletic shoes is a savvy idea to finish your ensemble. Relaxed outfits for 20-year-old guys aren't actually that hard, as you can see here.
Wear a crew-neck t-shirt with charcoal skinny jeans to feel absolutely confident and look sharp. When in doubt about the footwear, complete your look with a pair of white athletic shoes. If you're not sure how to dress as a 20-something man, this outfit is a wonderful example.