The XL 20″ x 30″ Faraday EMP Bag is perfect for large items such as large radios, solar inverters, Kodiak solar generator, small LED TV screens, small foldable solar panels, cordless power tools and so much more. This Faraday bag features an outstanding 38-pound puncture resistance.The multiple layer construction provides full protection against ESD, EMI/RFI and tribocharging. Electrical Properties *EMI Shielding (MIL-B-81705-Rev-C): >40 db Between 1 & 10 GHz Tech Protect has had their faraday EMP bags tested countless times to test for EMP protection. All tests prove that their bags are 100% EMP proof. It has always been the suggestion of Tech Protect to nest or place one bag inside of the other to give optimal protection against EMPs and Super EMPs. Nesting is placing one faraday bag inside of another faraday bag, therefore doubling the protection from an EMP. One EMP bag is EMP proof, however Super EMP technology exists and is capable of getting through more shielding. Therefore, it is recommended that all items be nested to prevent damage in the event of a Super EMP weapon being used.