Putting together a white and black crew-neck t-shirt with black skinny jeans is a nice option for an off-duty ensemble. Introduce a pair of dark brown leather casual boots to the mix for an added dose of sophistication. Picking out a well-coordinated outfit can be a bit of a juggling act on its own. Add extra cold temperatures into the equation, and the whole thing becomes even more difficult. Fear not, this here is your wintry style inspiration. As you can see here, in your 30s you have a wide range of dressing options.