Good air permeability, waterproof, wind proof performance is the most important.

透气性好，防水，防风性能最要。

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Because of good air permeability, even often time sitting on a chair, also won't feel hot.

由于透气好，即便常时刻坐在座椅上，也不会有发烫的感受。

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PET needle punching materials have good air permeability with the porosity of more than 90%.

PET针刺材料的透气性较好，孔隙率一般都在90%以上，符合多孔材料的结构特征。

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