You'll be amazed at how easy it is for any guy to get dressed this way. Just a black suit and a charcoal turtleneck. Ramp up your whole outfit by sporting a pair of burgundy leather oxford shoes. So when summer is fading away and fall is taking its place, this look has a good chance of becoming your go-to. When it comes to style for 40-year-old guys, this look is a good look on almost anyone.