For an effortlessly refined ensemble, make an olive trenchcoat and a green knit turtleneck your outfit choice — these two pieces work pretty good together. With footwear, go for something on the laid-back end of the spectrum and finish off this outfit with white leather low top sneakers. So as you can see, it's super easy to look on-trend and stay comfy come colder weather, thanks to this ensemble. And if we're talking dressing ideas for mature guys, this combo suits almost anyone.