A navy leather bomber jacket and navy jeans are the ideal way to introduce muted dapperness into your day-to-day casual arsenal. The whole getup comes together brilliantly when you complement your outfit with a pair of navy slip-on sneakers. As you can see here, it's very easy to look amazing and stay toasty when cooler weather arrives, thanks to this look. Overall, a great example of relaxed style for 20-something men.