I'm glad to see Bruce putting together a book, looking forward to that.

I've used a super shelter, with no sleeping bag, in subfreezing weather with great results. It was so warm that I could wear nothing more than a pair of shorts and a T-shirt. You do need to insulate yourself from the ground. I used pine needles.

People who haven't tried a super shelter in the field just don't understand. This is a subject where internet-only knowledge, and a lack of personal experience, hurts you. Like Bruce says (and Mors as well), one large step from the edge of the fire to the plastic is all you need.

I will say this: I have not found the need to use parachute fabric, or other breathable fabric, as opposed to a waterproof tarp. The heat is so strong that I just open up the edges of the plastic as needed to provide some ventilation. I never had a condensation problem. The heat takes care of that. Maybe if I was running this setup below 0 degF it would matter more to use breathable fabric.