For an ensemble that's extremely easy but can be styled in a great deal of different ways, consider teaming a short sleeve shirt with grey chinos. Let your styling prowess really shine by completing your ensemble with low top sneakers. Wear this pairing to look a bit sleeker than a regular teen boy.
A short sleeve shirt and dark brown chinos are a cool combination worth incorporating into your current arsenal. Add low top sneakers to the equation and you're all done and looking boss. Wondering how to nail smart casual outfits as you make your way through your teens? This combo is a great illustration.