This relaxed pairing of a brown wool blazer and navy jeans is a surefire option when you need to look casually stylish in a flash. Breathe some extra polish into your getup with a pair of brown leather double monks. We know it's always challenging to stay fashionable in the dead of winter, but this ensemble is hard proof that it's totally possible. Those wondering how to sport semi-casual outfits as you drift through your 20s, this outfit should answer your question.