The media used in the Accumulair Carbon Odor Block air filter is an activated carbon, non-woven polyester that is impregnated with 150% carbon add-on. In addition, the carbon impregnated media is pleated thereby increasing the surface area of carbon exposed to air flow.
Impregnating activated charcoal on a dust filtration media is designed to achieve a dual filtration effect. The substrate filters the particulate matter like pollen, dust mites, and large dust particles while the activated carbon filters the odors from smoke, pets, and cooking.
I have used this produce for at least 20 years and literally could not breathe without carbon air filters, and I've found Accumulair to be the best.