This casual combination of a navy cardigan and blue jeans is very easy to throw together in no time, helping you look seriously stylish and prepared for anything without spending too much time rummaging through your closet. For a classier touch, add brown leather casual boots to the mix. In the winter season, when warmth is critical, it can be easy to surrender to a less-than-stylish ensemble in the name of convenience. But this ensemble is a practical illustration that you totally can stay comfortable and remain stylish at the same time during the winter season. This outfit should clear any doubts you had about dressing elegantly as a gent in his twenties.