Effortlessly blurring the line between sharp and casual, this combo of a blue denim short sleeve shirt and black chinos is bound to become one of your favorites. For times when this look is too much, play it down with a pair of grey athletic shoes. This getup is a really savvy pick, especially for autumn, when the temperature is dropping. Gents who wonder how to rock cool casual style as you are making it through your adolescence, you have your answer.