If you’re a jeans-and-a-tee kind of dresser, you'll like the simple pairing of a crew-neck t-shirt and blue jeans. You can take a classic approach with shoes and introduce light blue slip-on sneakers to this look. So when spring is in the air, this outfit has a good chance of becoming your go-to. Gentlemen who are curious how to sport cool casual looks as you go through your 20s, you have your answer.