This pairing of a navy sweater vest and black jeans crosses the divide between formal and off-duty. If you're clueless about how to finish, a pair of tan suede casual boots is a great idea. During the winter months, when warmth is the priority, it can be easy to surrender to a less-than-stylish look. But this look is a good illustration that you totally can stay snug and remain stylish at the same time during the winter months.