材質問題 - 戶外用品

大家好

請問一下始祖鳥這件外套venta ar
( http://store.pchome.com.tw/tsibc/M04827779.htm )

裡面寫到的材質
720N WINDSTOPPER with Micro Check Backer
800SNP WINDSTOPPER with Micro Check Backer
520SNP WINDSTOPPER with Brush Knit Backer

520SNP,720N或800SNP是什麼意思呢?

謝謝~

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