Faraday Defense bags are the premium, heavy-duty ziplock bag offering the most protection in the marketplace today..and we can back it up with our Spec Sheet and Material Data Sheet. As a well established company serving the manufacturing, electronics wholesale and consumer markets, Faraday Defense is the choice for companies who want products utilizing premium materials and offering innovative solutions. Fully-specced for Electro-shielding, Moisture Barrier, non-transparent/translucent, solid metal, 5-layer ESD! A stronger polyester layer (Heavy Gauge) helps prevent sharp objects from puncturing and destroying the effectiveness of the bag. The bags are heat-sealable and suitable for vacuum packaging. - 2 Aluminum metal layers in this 5-layer bag provide maximum EMP bag protection. PRODUCT SPECS: 30 lb puncture resistance (MIL-STD-3010C Method 2065) - >45db EMI Attennuation (Max protection tested with 1 to 10 GHZ testing) - ESD Shielding 45db EMI attenuation, offer maximum protection for your items. Tested to meet or exceed certain electrical and physical requirements of ANSI/ESD S541, and to be ANSI/ESD S20.20 compliant. Bags are ROHS compliant and lead-free. Double-aluminized moisture barrier bag is designed to provide a static safe environment for sensitive electronic devices. 2 Aluminum metal layers in this 5-layer bag provide maximum EMP bag protection.