This combo of a white cable sweater and navy jeans is hard proof that a safe casual ensemble can still be truly dapper. Why not take a classier approach with shoes and complement your look with a pair of brown leather derby shoes? Keep this ensemble in mind come warmer days, and we promise you'll save time racking your brain for what to wear on more than one occasion. Those wondering how to wear modern off-duty looks in your early 20s, this combo should answer your question.