What is the difference between Static Shielding and Anti-Static bags?
Silver Static Shielding bags offer a metalized layer called a Faraday cage that shields the contents from a static charge.  An Anti-Static bag is made of a neutral material that does not generate nor shield from static.

Moisture Barrier Bag is designed for dry packaging of electronic devices and uses the first structure. The moisture bag replaces costly nylon/foil laminates with metallized polyester and offers the strongest price/performance relationship in the dry packaging of moisture sensitive devices. The moisture bag offers full protection from ESD, static fields and tribocharging. 

Contains a black color additive. Manufactured with a proprietary blend of 100% virgin low and linear low density polyethylene and a conductive additive. Meets the conductivity requirements of MIL-P-82646 Rev B. You cannot see through this product in interior light.

It is humidity independent, N-Octanoic acid free, does not promote corrosion and has no measurable outgassing. This material meets the electrical & physical properties of PRF-81705D Type II.

This transparent metal-in static shielding bag is designed to provide a static safe environment for sensitive electronic devices. Bags are printed with an ESD protective symbol and a lot code for traceability. Open top and ZipTop  styles are available. The bags are heat sealable. Static Shielding Bags are manufactured from a polyester, metal, polyethylene laminate. The polyester dielectric in concert with the metal layer provides discharge shielding. The exterior being static dissipative allows electrostatic charges to be removed when grounded.