A short sleeve shirt and beige chinos are a savvy combo to add to your current repertoire. White athletic shoes will provide function, but with a fashion effect. Just because you're a teenage boy, doesn't mean you can't dress fashionably, and this combination demonstrates just that.
You'll be amazed at how easy it is for any gentleman to get dressed like this. Just a short sleeve shirt and charcoal vertical striped chinos. To give your overall outfit a more relaxed feel, why not introduce a pair of white athletic shoes to the equation? So if you're hunting for style ideas on how to dress as you go through your teenage years, this combo is definitely worth saving for later.