This is a very warm jacket, when worn with a fleece and a hat. I'm a warmth fanatic, my gold standard is the North Face Nuptse (which I passed over only because of price & the colors are terrible this year). Even light exercise (walking the dog) in very cold temps and wind was enough to keep me toasty. I wish it had a collar-stashable hood and more pockets and I hope the nylon shell stands up like my old North Face. We'll see. A big plus is its generous sizing, so arm movements are completely unrestricted.