Just received this in the mail last night, perfect timing on a foggy morning today. Feels nice and warm but not hot as my body runs very hot. I ordered a large but a medium probably would have fit just as well, possibly a little snug. I wish they had a measurement guide to help with a better fit but I have no real complaint about the overall size. Hoping it doesn't catch with the butt of a shotgun on the lower portion of the shirt though. Shoulders fit amazingly well as I have trouble finding shirts that fit well in the shoulders, abdomen area is blousy which is why I made the comments above. I have a swimmers build and archers shoulders so it isn't easy finding clothes anyway. Great purchase, I recommend it.