bought in 1972. Jan 1 , 1973 me and friends went to Ely Minnesota snow shoeing. We slept in a van. temp was 35 below zero outside and 25 below zero inside van. I was warm. Had on everything. Had on goose down booties. In the AM you have to urinate. open side door and suffer! I am retired now. I used to drive all over the state for work. I have not been back packing in many years but I always carried this in my car just in case. Made by the northface. Mummy bag. All you need is a blow hole to breathe. It cinches up to a breathing hole. You have to lay this on a closed cell foam pad to stay warm.
