This relaxed casual combo of a short sleeve shirt and a white and navy crew-neck t-shirt is extremely easy to throw together without a second thought, helping you look dapper and prepared for anything without spending a ton of time rummaging through your closet. Infuse a more casual vibe into this ensemble by finishing off with grey athletic shoes. Guys wondering how to rock edgy casual outfits as you make your way through your teens, you have your answer.