Pair a crew-neck sweater with white jeans to put together a really dapper and modern-looking off-duty outfit. For times when this ensemble is too much, dial it down with a pair of athletic shoes. Keep this combination ready to go when warmer days are here, and we guarantee you'll save a ton of time racking your brain for a look on more than one morning. This outfit shows how 20-year-olds slay in the style department.