For comfort dressing with a modern take, wear a zip sweater with black jeans. Black chelsea boots will bring an extra dose of sophistication to an otherwise mostly casual ensemble. Smart outfits for stylish adolescent guys aren't actually that hard, as you can see here.
Marrying a zip sweater with a white track suit is an on-point pick for a laid-back yet stylish look. You can follow a more classic route in the footwear department with a pair of black chelsea boots. Gents who are curious how to look fashionable as you go through your teens, you have your answer.