One of the most popular ways for a man to style a denim shirt is to marry it with navy jeans in an off-duty look. Send your ensemble in a sportier direction by rocking athletic shoes. In the colder months, when warmth is critical, it can be easy to surrender to a less-than-stylish getup in the name of functionality. However, this getup is a stark illustration that you totally can stay snug and remain stylish at the same time during the colder months.