皮重：棉花包装材料的重量。

Tare: the weight of cotton's packaging materials.

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友情提示：我们所包装的商品均已去盒皮重是净重量。

Tips: All our packed commodities are of net weight.

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毛重是指商品本身的重量加上皮重(包装的重量)，也就是净重和皮重的总重量。

Gross weight is the sum of total weight of the commodity itself and the tare (the package weight). That's to say it refers to the net weight plus the tare weight of the goods.

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