Consider wearing a mustard crew-neck t-shirt and navy jeans to feel fully confident in yourself and look on-trend. Wondering how to complete this ensemble? Finish with casual boots to dial it up a notch. During winter, when warmth is a must, it can be easy to surrender to a less-than-stylish ensemble in the name of practicality. However, this ensemble is hard proof that you totally can stay cozy and remain equally stylish in winter. Perfect if you're looking for some incredibly inspiring off-duty style for 30-year-old men.