Electric car brand Tesla Motors [NSDQ:TSLA] says it is developed a HEPA air filtration system designed to clear up the outside world before it enters a vehicle's cabin.

The filtering system is so clean that Tesla claims you could "survive a military grade bio attack" using it.

HEPA, an acronym for "high-efficiency particulate arrestance", means that the filter is capable of capturing 99.7 percent of particles 0.3 micrometers and larger.

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Tesla Model X HEPA filter

Tesla Model X HEPA filter

Tesla says its HEPA filter was inspired by the kind used in hospitals and in aerospace applications, and that the system is "hundreds of times" more effective than standard cabin air filters used in other vehicles.

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The HEPA filter is part of Tesla's "Bioweapon Defense Mode," a term generally considered tongue-in-cheek until a recent test in which a Model X was placed in a sealed bubble filled with air containing 83 times as many particles as the EPA considers to be "good" air quality.

With the Bioweapon Defense Mode switched on, the Model X's HEPA filter cleared the pollution to levels Tesla says were entirely undetectable by instruments. Moreover, Tesla says the Model X actually began cleaning the air outside the car because of how effective its filter was at sucking in pollution. 


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