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About product and suppliers:
        Alibaba.com offers 322 tyvek envelopes products. About 27% of these are paper envelopes, 20% are mailing bags, and 10% are packaging bags. 

A wide variety of tyvek envelopes options are available to you, such as ordinary paper, kraft, and poly. You can also choose from gift envelope, business envelope. As well as from window envelope, wallet envelope. And whether tyvek envelopes is free samples. 

There are 316 tyvek envelopes suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and Pakistan, which supply 87%, 10%, and 1% of tyvek envelopes respectively. 

Tyvek envelopes products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 67 with ISO9001, 16 with Other, and 14 with ISO13485 certification.