A crew-neck t-shirt and navy and white sweatpants are a nice combination worth having in your daily off-duty routine. As for shoes, complete your look with a pair of black athletic shoes. So as you can see here, it's an on-trend, not to mention season-appropriate, ensemble to have in your seasonal collection. Gentlemen who are curious how to wear cool off-duty looks as you are making it through your adolescence, this combo should answer your question.