Rock a white and red print crew-neck t-shirt with blue jeans if you're on the hunt for a look idea that conveys city casual style. Add an easy-going feel to this look by wearing black athletic shoes. So as you can see here, it's a knockout, not to mention spring-appropriate, combo to have in your transeasonal rotation. This combination shows that as a 30-year-old guy, you have a wide range of dressing options.