Okay -- winter storm -- Consider instead of "Sweatpants, sweatshirt" you include fleece pants and an appropriate fleece top (half zip, et al).
Disclaimer: I am a member of REI, but There are lots of other good, better places to get poly fleece & wool.

Bugging in during winter with the power off, cotton or even cotton-poly sweats just don't cut it. Fleece and wool.
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Better is the Enemy of Good Enough.
Okay, what’s your point??