This combination of a blue sweater and blue jeans is hard proof that a safe casual look doesn't have to be boring. You could take a more casual route in the shoe department by rocking tan leather sandals. Come boiling hot sunny days you're looking for a look to keep you comfy and sharp –– this getup is just the right one. Ideal to show the world that even as a 20-year-old guy you're confident enough to hold your own in the outfit department.