Want to inject your wardrobe with some casual city style? Dress in an orange parka and navy jeans. A pair of charcoal athletic shoes instantly boosts the appeal of this look. During winter, when functionality is imperative, it can be easy to surrender to a less-than-stylish ensemble. This ensemble, however, is a striking example that you totally can stay comfortable and remain equally stylish during winter. Now that's how you keep it casual in the fashion department at 30.