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Scientific testing is what will sell it to manufacturers and consumers alike.....or else just put it on dickbook.

I have possum fur beanies and possum fur socks,they are nice and warm and nice and soft and good for going to town on a winters night and that is about it.
Wool fibers naturally lock together and...

puffer jackets/sleepingbags work on using the "loft" ability of down, it can squish down to nothing and puff up again. possum fur does not do that to the same extent like sheeps wool.
merino...