This combination of a long sleeve shirt and a green-yellow crew-neck t-shirt is beyond stylish and creates instant appeal. A pair of black and white canvas low top sneakers will be the ideal addition to your outfit. When temps are falling and autumn is setting in, you'll love this ensemble as your uniform for transeasonal weather. Those who are curious how to rock cool casual dressing as you are making it through your teen years, this getup should answer your question.