Sounds like a heavy duty mylar bag.
The Ultimate Protection from an EMP for $20 — The Resistor ARK
Crossbreed Resistor Ark bag
Crossbreed Resistor Ark
Crossbreed branched out with a new product launch—The Resistor. The Resistor is part of the ARK Protector Series. Essentially, it is protects your stuff from the elements. No big deal right? Well it is also a shield from one of the biggest and most likely global threats—Electromagnetic pulse. I was a bit skeptical, but it kept getting better. The material used to make the ARK Resistor bag is the same as is used to protect missile guidance systems for U.S. Military weapon systems. The Shooter’s Log will be reviewing The Resistor ARK in future. For now, here is the full release from Crossbreed.
ARK RESISTER BAG
The Ark Resister Bag by CrossBreed offers superior electronics protection that significantly exceeds all military requirements for EMP and static discharge resistance including the stringent standards of MIL-PRF-81705. Previously available only to the military to protect high value guided weapon systems, the Ark Resister Bag is now available exclusively through CrossBreed. Reusable by design with 20 years of proven field use, the Resister Bag can also be used to line a case and serve as a Faraday Cage for sensitive and valuable electronic devices. When heat sealed, the Resister Bag is also waterproof, dustproof, corrosion, and puncture resistant.
http://blog.cheaperthandirt.com/ultimate-protection-emp-20-resistor-ark/
