To put together an off-duty outfit with a modern twist, you can always rely on a navy wool turtleneck and grey chinos. Add a pair of white canvas low top sneakers to your look to immediately ramp up the street cred of this outfit. When spring is in the air, you'll love this getup as your favorite for winter-to-spring weather. Think it's hard for gents in their 20s to perfect smart casual dressing? This combo is a clear demonstration of otherwise.