For an ensemble that's worthy of a modern sartorially savvy gentleman and effortlessly classy, opt for a dark green trenchcoat and a crew-neck t-shirt. And if you need to easily perk up this ensemble with shoes, complement your outfit with beige suede chelsea boots. This one is a viable choice when it comes to figuring out a cool look for summer-to-fall weather. This ensemble is a vivid example guys in their forties can very well slay in the fashion department.