Pairing an olive turtleneck with khaki denim overalls is an awesome pick for a cool and casual ensemble. Rounding off with a pair of high top sneakers is a fail-safe way to introduce a touch of stylish nonchalance to this ensemble. So as you can see, it's extremely easy to look seriously stylish and stay toasty come cooler days, all thanks to combos like this one. Men who are curious how to rock modern off-duty outfits as you make it through your 20s, this combo should answer your question.