I had an Adventure 16 mummy bag (back in the 70's, when they made a lot of gear) with a baffled zipper around the foot so you could open it flat, and you could take a similar bag, put it on top and have a double bag, as well. But I liked the zipper foot because I like to have my feet outside of the bag a lot of the time. I currently have a Marmot Helium. I normally just open it up and put it over me like a blanket, unless it's very cold.
There is a point of no return unremarked at the time in most lives. Graham Greene The Comedians
A clean house is a sign of a misspent life.