A denim jacket and a navy crew-neck t-shirt are among the crucial items in any modern gent's properly balanced off-duty sartorial collection. On the shoe front, this ensemble is completed really well with black leather low top sneakers. So if it's a warm day and you want to look dapper without exerting much effort, this outfit will do the job in no time. Those who are curious how to wear modern casual outfits as you make your way through your 20s, you have your answer.