I ordered this jacket in a Large size. I have a 39.5" chest and 32" waist. With only a tight t-shirt underneath, the jacket was tight across the chest and very tight under the arms. I have long relatively thin arms and this jacket was tight and restrictive around my arms, although the length was fine. It seemed well constructed, although I am skeptical how windproof it would be. In conditions below 14 F, I would definitely want a thicker insulating layer underneath. I returned it.