Comment: I have the one from Identity Stronghold.

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In reply to comment: not sure about those bags. A (see in situ)

I have the one from Identity Stronghold.

It works, but they wear out. They are good for up to 6 months, or 500 openings. I replaced mine recently after my old one quit working. New one works fine.

http://www.idstronghold.com/Cell-Phone-Shielded-Bags/product...