Dress in a grey overcoat and a grey turtleneck for a neat polished getup. To bring a little fanciness to this ensemble, introduce a pair of black leather chelsea boots to this look. When you're having one of those dreary autumn days, sometimes only a knockout look like this one can get you to face the outside world. Stylish and ideal for a teenager, an outfit like this will help upstage any of your pals.