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Title
What's the Best Filler for Insulated Outerwear?
Abstract
The article presents information on goose down, which is used as a filler in winter outerwear. Scientists at the University of Wisconsin conducted a study in which they measured the thermal insulation of down, wool, polyester and polyolefin fibers. The study found that regarding insulating value, down was best, polyolefin and wool were intermediate, followed by polyester.