This zip up is heavy and soft on the inside! It will keep you warm and you will want to wear it all the time. If you get several, you'll pretty much never have to do laundry! We're not going to say that it's warmer than Mammoth wool, because it's WAAAAAAYYY warmer than Mammoth wool. Just trust us on that one. 

True to size. 80/20 Cotton/poly.