This laid-back pairing of a white short sleeve shirt and navy jeans is a life saver when you need to look nice in a flash. For a dressier feel, why not introduce dark brown suede loafers to this look? We're loving how this combo gets you excited for chillier weather in next to no time. Those wondering how to rock modern casual dressing as you make your way through your 20s, this pairing should answer your question.