the static shielding bag material contains three layers, that is, static dissipative polyester outer layer, aluminum shielding middle layer, and anti-static polyethylene inner layer. this bag can keep static-sensitive components away from the potential static danger. In addition, this kind of hot-sealed bag is translucent, so inside goods can be easily recognized esp. for barcode reading. Zip-lock type is easily to be opened as using and can be repeated used.