Showcase that you do smart casual men's style like a true connoisseur of modern men's fashion in a trenchcoat and light blue jeans. For shoes, you can follow the casual route with a pair of navy high top sneakers. So if you're on the hunt for an ensemble that's on-trend but also entirely spring-ready, look no further. Think it's hard for men in their 40s to master modern casual dressing? This combination will prove you wrong.