A blue long sleeve shirt and black skinny jeans are the kind of a never-failing casual outfit that you need when you have zero time to plan a look. We adore how a pair of white canvas low top sneakers makes this look whole. So as you can see, it's a killer, not to mention spring-friendly, getup to have in your seasonal wardrobe. When it comes to casual style tips for 30-year-old men, this combination is a good look on most guys.