Bigfoot,

That drawstring "snow door" was in the WW II U.S. Army 10th Mountain Division nylon (yes!) mountain tents that were reversable - white on one side and O.D. green on the other. Why do I know this? B/C as a Boy Scout in the '50s in Toledo Ohio, our troop had five of thse beauties, complete W/ 4 sectioned wooden, metal tipped & jointed poles for the two A-frame sleeves at each end.

Those were "high tech", high speed tents in those days. Other Scouts drooled over them and the speed with which we could get them up. Plus, on windy days we were often the only ones with no tent problems AND they had - wonder of wonders - SEWN IN FLOORS!

Eric