Activated carbon filters may reduce some tar, but how much depends on: The amount of carbon in the filter The size and design of the filter Airflow and how tightly smoke is pulled through How hot the smoke is How fast a person inhales Carbon filters often include other materials too, like paper or fiber, which can also catch particles
No shipping damage due to excellant packaging
Proceedings of the National Academy of Sciences
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Now I know that sounds funny but right out of the box they come with about a 90% charge already