Such pieces as a black cardigan and charcoal knit wool chinos are the ideal way to inject effortless cool into your daily arsenal. And if you want to instantly tone down this outfit with one piece, add a pair of white athletic shoes. So as you can see, it's very easy to look seriously stylish and stay cozy when chillier days are here, all thanks to looks like this one. All in all, an ideal example of off-duty fashion for 30-year-old men.