For a look that's super simple but can be styled in a multitude of different ways, choose a light blue chambray long sleeve shirt and black jeans. Put a different spin on an otherwise utilitarian outfit by finishing with a pair of black leather derby shoes. You can bet this getup will become your go-to when spring comes. As a man in his 30s, you probably want to start dressing maturely. In this case, inspiration like this comes in very handy.