EMP Proof Large Protective Bag, 19 1/2" x 22" by Crossbreed, ARK Protector Series"The Resister" -

Bag Dimensions: 19.5" x 22"

The Ark Resistor Bag by CrossBreed is made from the same material used to protect high value missile and guided weapon systems for the US Military. Previously available only to the military and now available exclusively through CrossBreed, this material has nearly twenty years of proven protection from moisture, corrosion, dust, dirt, electrical pulse, and static discharge. The Ark Resistor Bag offers superior electronics protection that significantly exceeds all military requirements for EMP and static discharge resistance including the stringent standards of MIL-PRF-81705. Furthermore, when heat sealed, the Resistor Bag is waterproof, dustproof, corrosion resistant, and resistant to 30 pounds of puncture pressure.

What is Mil-PRF-81705?
This specification establishes the requirements for heat-sealable, electrostatic discharge protective, flexible barrier materials used for the military packaging of microcircuits, sensitive semiconductor devices, sensitive resistors, and associated higher assemblies. In addition, the type I materials provide for water-vaporproof protection and attenuation of electromagnetic interference effects.

The exterior of the bag is a conductive shield which offers resistance against EMP while the inside is coated with a non-conductive layer which electrically isolates any inner contents from the outside world.

The concept of a Faraday cage is such that it (or a Faraday bag) will attenuate the voltage spike from a weaponized electromagnetic pulse (which is extremely short in duration, ~5 nanoseconds) while providing a level of protection for the contents inside.

Note that there is also a natural phenomenon which my emanate from our sun, called a CME (coronal mass ejection). If strong enough a CME could also produce damaging effects to electronic circuits here on earth. Similarly a Faraday cage may provide protection.