Bill
Pressurization? Are we not talking about a tent?

ANyway the real reason they do it that way is because thats what the British Expeditionary forces did it in Canada and modern hot tent campers up there wear the same clothes made of the same material and use the same tents and stoves. No one is interested in changing or in pressurised tents or in any new fangled way of doing anything. The companies sell to the traditionalists and have an image to maintain.

Someone wrote in a year ago saying that he and his girlffriend were going camping and how do you heat a tent. A bunch of people told him you do not heat a tent, you carry the right gear to stay warm.

The subject of the thread is "winter bag choice" not "how to avoid buying a winter bag".
Jim