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In addition to our mask for pollutants that can offer immediate protection to contaminants in the air, our specialty HVAC filters work actively to remove those contaminants, including smoke smells and the harmful VOCs associated with smoke odors

The quick answer, by smoker type Best overall: Special Blend, the everyday classic American cigarette taste, coil-friendly Best for light, golden cigarettes: Virginia, mellow and mildly sweet, our most-reviewed blend Best for menthol smokers: Special Blend Menthol, crisp mint over real tobacco Best full-bodied classic: American Blend, the fuller version of the Special Blend profile Boldest: Kentucky, fire-cured and smoky Not sure which is you

The basic problem with them is identified in this thread on the Guardian

It is used to designate an air filters efficiency in absorbing pollutants