This laid-back combo of a dark green harrington jacket and a short sleeve shirt is extremely easy to put together without a second thought, helping you look on-trend and ready for anything without spending a ton of time going through your wardrobe. Complement your look with a pair of grey athletic shoes to add a sense of stylish nonchalance to this getup. Rest assured, this getup will keep you toasty as well as looking seriously stylish in this transitional weather. This look is most probably exactly what you've been looking for as a teenager.