This off-duty combo of a shirt jacket and jeans is a real life saver when you need to look cool but have no time to plan out an ensemble. If you want to break out of the mold a little, complete this getup with beige athletic shoes. Dressing smartly is the trick to surviving cold temperatures, but this ensemble is a practical illustration that you can do it with style. Wondering how to master casual dressing as you cruise through your 20s? This combination is a practical illustration.