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straighttoplaid t1_j244hdi wrote

Reply to comment by RobleViejo 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

When we're talking about being "warmer" inside it could still be below freezing. If it's negative 20C and windy outside having a space that's 0C with no wind will feel way warmer.

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RobleViejo t1_j247ey7 wrote

Thats a good point. I guess -1ºC would feel comfortable without wind and with winter clothes when its windy and -15ºC outside.

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Solarisphere t1_j27v7l8 wrote

Can confirm. I’ve slept in a snow cave a few times and it’s quite comfortable inside without the wind chill.

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