Get into dapper mode in a double breasted blazer and a long sleeve t-shirt. Play up the dressiness of your look a bit by wearing a pair of burgundy leather loafers. This combo shows how to wow in the semi-casual style department as a 20-something guy.
For a surefire semi-casual option, you can always rely on this pairing of a double breasted blazer and a long sleeve t-shirt. A pair of white leather low top sneakers will bring a relaxed aesthetic to the look. Certainly a good choice if we're talking style for 20-year-old gentlemen.