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1. strong thermal insulation performance: the fibers of down are hollow tubes with thin walls, and numerous down fibers gather together in a three-dimensional shape, forming a layer of insulation and cold prevention net, making it difficult for body temperature to dissipate and cold air to invade th 2. lightweight and soft: down has the natural characteristics of being light and soft, so wearing down products can make people feel relaxed, soft, and comfortable. 3. strong fluffiness: the down fiber structure is unique, forming a natural three-dimensional shape, so the down jacket is not prone to wrinkles. 4. dry and refreshing: it can quickly absorb and expel sweat from the human body..syi