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odd_1nt3g3r5 t1_j24v99r wrote

Reply to comment by WalkerBRiley 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

Yep, we were cautioned about sweating during training before our outing. Go slow, pay attention to your body, and remove layers (especially your hat, weirdly enough) if you get too warm. Sweat is deadly in the cold.

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