ESD shielding bags can discharge static electricity because the surface of the body bag (internal, external or both) is electrically conductive and in contact with another conductor (ESD grounding plate). To enable the shielding bag to discharge charge, it must be electrically conductive. Connected to a conductor (usually required to be grounded), the antistatic bag has antistatic properties and can be shielded, electrically conductive or MVB free. All anti-static measures mean that the anti-static bag will not charge more than a certain voltage (usually 250V).
The shielding bag should have foil or conductive film in all parts of the bag, depending on the device you are protecting. Bags made of conductive, antistatic, shielding, and water vapor barrier materials protect almost all sensitive devices, but may be overprotected.
