The feather and down proofness is the most important quality request. It can be roughly calculated from the construction data of the fabric.
羽毛/羽绒不穿透性是最重要的质量要求。这可以从面料的结构数据中粗略的计算出来。
Another possibility to check approximately the feather and down proofness is to measure the air permeability of the fabric.
另外可能近似测试出羽毛羽绒不穿透性的方法是：测量面料的空气渗透性。
Even light winds tossed the fabric craft like a feather.
即使轻风把这个纤维手工艺品像一片羽毛那样抛掷。
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