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very light and warm. today, all of us wear down jackets that are usually filled with 90 percent white eiderdown, which is very warm and doesn't look bloated. high thermal performance the animal hair inside the duvet itself is a triangular skeleton structure, so the air storage is relatively large, good temperature isolation, it is breathable and dry, and the fluff is not as easy as the cotton quilt. the fluff is light and fluffy in the down products, so that the human body is always in a comfortable state..syi