A white long sleeve shirt and a black suit are a great combo that will get you the proper amount of attention. For times when this getup looks all-too-dressy, dress it down by slipping into a pair of grey athletic shoes. So if it's a hot summer day and you want to look dapper without putting in too much work, this outfit will do the job in seconds time. Those who wonder how to wear smart casual looks during your teen years, you have your answer.