So basically, first kill all the loft in the insulation?
Interesting thing, insulation. I thought that thickness/loft was all that mattered in clothing insulation. That was the rap on down, that it was the lightest, most compressible material that would re-establish loft and insulation value. But that is clearly not true for asbestos, where a thin layer is enough to insulate a steam pipe. And it is clearly not true of fleece, or wool- some wool or fleece jackets will keep me as warm as a down jacket will despite being much less lofty.
And the poncho liners are not very lofty at all, and still quite warm.
This all gets analyzed out in building insulation by R-values assigned to various insulation products. Is there a similar way to evaluate clothing insulation values?