Try pairing a navy crew-neck sweater with navy jeans to put together a casually dapper outfit. Rounding off with brown leather derby shoes is a surefire way to add a bit of classiness to this ensemble. So as you can see here, it's a cool, not to mention season-appropriate, getup to have in your seasonal arsenal. Interested in dressing tips for 20-year-olds? This ensemble is great inspiration.