This pairing of a crew-neck sweater and a dark green long sleeve shirt is hard proof that a pared down casual outfit can still be really interesting. Want to play it down when it comes to footwear? Complete your look with a pair of grey athletic shoes for the day. A neat outfit that will take you from summer to fall like this one makes it super easy to embrace the new season. This is a pairing you, as a guy over 40, can always count on.