This casual combo of a brown suede biker jacket and light blue jeans is a never-failing option when you need to look good in a flash. And if you need to effortlessly ramp up this ensemble with shoes, complete this outfit with dark brown leather derby shoes. So as you can see here, it's a knockout, not to mention season-appropriate, getup to keep in your seasonal rotation. Men wondering how to wear modern casual dressing in your thirties, this combination should answer your question.