An olive wool gilet and khaki jeans are a combination that every sharp gent should have in his casual wardrobe. Feeling venturesome? Lift up your outfit with a pair of dark brown leather derby shoes. In the colder months, when functionality is the priority, it can be easy to surrender to a less-than-stylish ensemble in the name of practicality. This ensemble, however, is a stark illustration that you totally can stay warm and remain stylish during the colder months.