ChilkoXX
ChilkoXX t1_j24m0v5 wrote
Reply to TIL Snow is an excellent insulator because it consists of about 90–95 percent trapped air (fresh). This is the reason why igloos are warmer inside than outside, and why some animals in colder regions build snow caves to spend the winter while hibernating. by SunCloud-777
This is why in outdoor survival they teach you build a snow cave that will fit you and your sleeping bag and bivvy bag(body bag we called them), under at least 1-2 foot of snow for insulation. Ice the inside with a candle flame, it's much like building an igloo.
ChilkoXX t1_j24m9r9 wrote
Reply to comment by VacelationWaffles in TIL Snow is an excellent insulator because it consists of about 90–95 percent trapped air (fresh). This is the reason why igloos are warmer inside than outside, and why some animals in colder regions build snow caves to spend the winter while hibernating. by SunCloud-777
also the inside ices up. This prevents any warm air from penetrating the snow layer.