If you're searching for an off-duty but also on-trend look, consider teaming a white turtleneck with black jeans. Bring an easy-going vibe to your getup by slipping into athletic shoes. As you can see here, it's very easy to look amazing and stay cozy when chillier weather arrives, all thanks to ensembles like this one. And if we're talking casual fashion for 30-something Millennial guys, this look is perfect.