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About product and suppliers:
        Alibaba.com offers 1,066 opaque envelopes products. About 71% of these are mailing bags, 6% are paper envelopes. 

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

There are 1,062 opaque envelopes suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and India, which supply 98%, 1%, and 1% of opaque envelopes respectively. 

Opaque envelopes products are most popular in North America, Western Europe, and Oceania. 

You can ensure product safety by selecting from certified suppliers, including 711 with Other, 213 with ISO9001, and 66 with ISO14001 certification.