For a laid-back outfit with a modern spin, consider wearing a grey long sleeve shirt and navy chinos. Why not add athletic shoes to the equation for a dose of stylish casualness? Just because you're a teen guy, doesn't mean you can't look stylish, and this combo demonstrates exactly that.
If you don't like spending too much time on your combos, try pairing a grey long sleeve shirt with light blue jeans. Feeling experimental today? Switch things up by finishing off with a pair of athletic shoes. When it comes to dressing ideas for teenage boys, this look is perfect.