If it's comfort and functionality that you appreciate in a look, pair a black long sleeve t-shirt with navy jeans. Finish with a pair of navy canvas high top sneakers to add a little kick to the look. This is a pairing you, as a teenage guy, can always count on.
Black Long Sleeve T-Shirt with Navy Jeans Casual Warm Weather Outfits For Men In Their Teens
For a casual outfit with a modern finish, you can go for a black long sleeve t-shirt and navy jeans. A pair of black leather casual boots instantly polishes up the look. Relaxed casual looks for teen guys aren't actually that hard, as you can see.