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and now that I've actually watched the vid, useless for this experiment!
Hmm, maybe I should test it.
Problem is, now too fat and fitless (?) to last long enough to get dry/warm most likely.
...

Curious that with the strong chinese imprint here, that silk underwear hasn't arrived yet.
Used when in Canada in 80's.
Very warm to wear, light, compact packing, (fireproof) but thin to sweat in....