You'll be surprised at how easy it is for any guy to throw together this casual look. Just a beige plaid flannel long sleeve shirt paired with black jeans. For maximum effect, complement your look with a pair of brown leather casual boots. So if you're on the hunt for an ensemble that's on-trend but also feels entirely spring-friendly, this one fits the task well. And if we're talking casual style tips for 20-something men, this combination is perfect.