Alot of houses are insulated with blown paper insulation as well.
Personally when i know im gonna be out in the cold, its wool for me. I prolly have 20pr of them lifetime basspro merino wool socks. Got some old wool bibs and a wool vest i picked up at a gunshow. Also use them shiney pants things the bicycle racers wear, use them like long johns. Old wool glove inserts from milsurp store. Now if i could find a cheap wool elmer fudd hat id be set.
if you want a very good built elmer fudd hat check out CC filson.I have one ,love it,last forever.