If you're on the hunt for an off-duty yet dapper getup, rock a yellow crew-neck t-shirt with cargo pants. And if you want to immediately step up your look with one piece, complete your ensemble with black suede casual boots. So as you can see, it's very easy to look amazing and stay cozy when colder weather arrives, all thanks to looks like this. This one is a modern yet age-appropriate ensemble for a man in his 20s.