If you're looking for a laid-back but also on-trend ensemble, rock a white crew-neck t-shirt with navy jeans. Hesitant about how to complement this getup? Round off with a pair of black leather desert boots to kick it up a notch. In the winter months, when warmth is crucial, it can be easy to settle for a less-than-stylish getup. However, this getup is a striking example that you totally can stay comfortable and remain stylish during the winter months. As a guy in his 30s, you want to start dressing more professionally. If that's the case, outfits like this prove useful as a source of inspo.