What everybody has been saying about the fit is true. I am 5'10", about 190, so a little bigger, and went with the XL. It's not super loose, but loose enough to where I could put a medium layer underneath it. It is definitely more of a functional fit than some of the more fasion oriented jackets that are longer and baggier, but way it is cut is still quite nice. It is longer in the back, and the sleeves have some extra length so that you can move around without them pulling up off your wrists. The only issue I have found is that there is no mesh on the pit zips, not a deal breaker, but would have been nicer with it. Great shell overall, hit it up on SAC for 100 bucks!