This pairing of a long sleeve shirt and dark green chinos is pulled together and yet it's relaxed enough and ready for anything. For footwear, you can take a more casual route with red and white athletic shoes. As the weather warms up, it's time to get rid of those bulky winter gear and choose an outfit that's lighter, like this one here. So if you're after fashion tips on how to dress as a teenage guy, this ensemble is a great example.