Dawb goose down muaj ob qhov zoo: 1. Nws yog dav siv nyob rau hauv ntau lub teeb-xim duvets thiab down tsho, thiab nws yog opaque; 2. Qhov zoo ntawm cov mos mos, slim fibers ua kom nws zoo dua o thiab ua kom sov.
RONGDA yog ib lub chaw muag khoom ntawm cov khoom siv raw rau cov khoom qis, txais tos los tham