I swear these UK companies have the most stupid sizing on the market. I am 5"10 175lbs and not big by any means. I The medium has a really stupid fit. The arm holes are tiny, there is no articulation in the elbows and the chest is so damn tight. There is no way to layer this thing. Its not a trim fit, its not athletic, its just stupid. The body fits perfect, the sleeve length is perfect The hood is perfect, its just the chest and overall arm holes and sleeve size. You cannot layer this thing. This makes me so mad...screw this company . I could have tried a large but that must makes no sense. The sleeves would be too long. Are all these Europeans build stupid in the chest? Do they seriously like to layer and restrict their movement by 100%? Idiotic sizing by all means. The actual quality of the jacket is awesome and so is the hood. If they made this for Americans it would be better.