For a casual look, wear a light blue denim jacket with a grey sweatshirt — these two items go nicely together. To introduce a more casual touch to your getup, add white and black leather low top sneakers to the equation. So if you're searching for an outfit that's sharp but also entirely spring-friendly, this one fits the bill. Those wondering how to rock modern off-duty outfits in your early 20s, this outfit should answer your question.