Assertion: sleeping bag's insulation | /r/MadeOf | goose or duck plumage
Facets:
Source sentences:
text: Down insulation is made from goose or duck plumage which is very lofty and fluffy – this material has many tiny air pockets where the body-warmed air gets trapped.
text: Down insulation is made from goose or duck plumage which is very lofty and fluffy – this material has many tiny air pockets where the body-warmed air gets trapped.