Opt for a blue cardigan and a long sleeve shirt for a casually edgy and fashionable outfit. Complement this outfit with brown leather casual boots and you're all done and looking boss. In the colder months, when warmth is critical, it can be easy to surrender to a less-than-stylish look in the name of functionality. However, this look is a good illustration that you totally can stay warm and remain equally stylish during the colder months. This combination should inspire anyone who was doubtful about more sophisticated style in his twenties.