If you're on the lookout for a casual and at the same time dapper look, marry a sweatshirt with navy chinos. Does this outfit feel all-too-fancy? Introduce a pair of athletic shoes to shake things up. Keep this ensemble ready to go come warmer days, and rest assured, you'll save a lot of time getting dressed on more than one morning. So if you're in search of style ideas on how to dress as you work your way through your adolescence, this pairing is ideal.