Velostat is a packaging material impregnated with carbon black

Carbon black

Carbon black is a material produced by the incomplete combustion of heavy petroleum products such as FCC tar, coal tar, ethylene cracking tar, and a small amount from vegetable oil. Carbon black is a form of amorphous carbon that has a high surface-area-to-volume ratio, although its...

 to make it electrically conductive. It is used for the protection of items or devices that are prone to damage from electrostatic discharge. It was developed by Custom Materials, now part of 3M

3M

3M Company , formerly known as the Minnesota Mining and Manufacturing Company, is an American multinational conglomerate corporation based in Maplewood, Minnesota, United States....

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Other uses

It is also used in Thought Screen Helmets, claimed to block telepathy by extraterrestrial beings.