If you're hunting for a casual and at the same time on-trend outfit, go for a mint long sleeve shirt and brown chinos. Complete this look with brown suede desert boots for maximum style points. And if you're on a mission for a cool outfit that will take you from winter to spring, look no further. As a 30-year-old gentleman, you probably want to start dressing more like a mature gentleman. If that's the case, inspiration like this comes in handy.