What is down?



Down grows on the abdomens of geese and ducks and becomes reed-like fluff, which is called feathers in sheets. Since down is an animal protein fiber, it has higher thermal insulati…

Down grows on the abdomens of geese and ducks and becomes reed-like fluff, which is called feathers in sheets. Since down is an animal protein fiber, it has higher thermal insulation than cotton (plant cellulose), and the down ball-shaped fiber is densely covered with tens of millions of small triangular pores, which can shrink and expand with changes in temperature, producing a temperature-regulating function. Absorbs the flowing heat emitted by the human body and blocks the intrusion of cold air from the outside.

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