Made of polyethylene, polyester, and aluminum layers with an anti-static coating. Our static shielding zip top bags meet the electrical and physical requirements of ANSI/ESD S541, EIA 625 and are ANSI/ESD S20.20 program compliant. Tested per MIL-STD-3010 4046 and ANSI/ESD STM11.11. All bags feature a side weld construction. Manufactured to provide Faraday Cage protection and visibility for highly-sensitive components.