Metallic Static shielding zipper bags are an excellent option for maximum protection against static charges both inside and out. The various layers of these zipper anti-static bags function as a barrier, allowing static electricity to move around the bag but not through it. This zipper style allows reusability and the thick polyethylene inner layer not only suppresses static but resists punctures and tears, even with repeated usage. Basically, the reclosable zipper allows for repetitive opening and closing with guaranteed closure every time. These anti-static shielding poly bags meet all electrical requirements.