One of the most popular ways for a man to style a navy denim jacket is to marry it with black and white chinos in an off-duty ensemble. Feeling adventerous today? Switch things up by slipping into a pair of loafers. With rising temperatures come warmer days and more sunlight and the need for a neat ensemble just like this one. Wondering how to dress age-appropriately as you slip into your 30s? This combo is a practical illustration.