I really want to like this jacket but something is just off in the way it fits. I've been an OR customer for over a decade and within the last few years it seems that all the sizing of their clothing has become wonky and less consistent from jacket to jacket. I get that this one is supposed to have a 'trim' fit, which I actually appreciate, but the diameter of the arm sleeves is just too tight. I tried all sizes and I feel like a gym bro (I'm not) wearing a t-shirt 2 sizes too small. I am 6'1", 195lbs and usually wear size L or XL is some cases, but neither of those sizes worked for me in this jacket. I do not have exceptionally large arms either. I have an athletic build and would consider myself slightly above average in muscle-mass, which is right where I'd assume an outdoor clothing company would aim for it's "trim" or "athletic" fit clothing. Anyway, I'll have to pass on the trim fit clothing until the arms are fixed. Other than the sizing issues, this jacket looks amazing and seems to be very high quality.