Scrap that idea.
"It does not have much insulation but is notorious for keeping the condensation in. In the morning you will be quite damp! It is heavy and has a bad shape for a sleeping bag. The people who designed it might have still suffered from frostbites from Russian winters in WWII as it can double as an overcoat.
The cover which comes with it keeps the humidity and dirt out but thatīs it. A sturdy piece but very ineffective. Some hunters use it for stand hunting. They discard the cover and take advantage of the fact that the material is quiet. Maybe this is the best use you can make out of it.
Having spent some cold spring nights in it knowing I could have been toasty and warm in my own gear makes me reject it vigorously. "