I ordered one of these after using a similar version issued to me when in Alaska. This is not military grade! The one I used in Ak had much more insulation (though chunkier)and the outer layer was much thicker. I should have known better for the price. It holds up pretty well in anything above 40 degrees. I have since used this parka many times including a backpacking trip where temps went a few degrees below freezing. It will keep you alive, but not comfortable. It is not highly wind resistant either; 10 knots or more and you will feel the chill. It beads off water well enough but I would not trust it in a downpour. The overall feel jacket feels very cheap; you feel compelled to be very gentle with it as though it will rip open if caught on something. I do have to commend Alpha Industries on price however. It looks like a parka twice it's price from afar. Also it is pretty compressible and lightweight for it's size. I have retired it to act as a sleeping bag for my dog on backpacking trips because of those reasons. I am 5'9 150 pounds and ordered a medium. It fits pretty well however the arms are a little too long and can engulf my hand completely.