A white long sleeve t-shirt and grey chinos are an easy way to introduce effortless cool into your current off-duty rotation. If you're puzzled as to how to finish off, a pair of white leather slip-on sneakers is a foolproof option. So as you can see here, it's a dapper, not to mention season-appropriate, ensemble to keep in your seasonal closet. A great, less conservative outfit for 30-something guys.