A Moshi Carbon bag is an air purifier that contains activated bamboo charcoal. Select bamboo plants are processed into charcoal and activated by heating it to 900 degrees Celsius. This extensive process allows the carbon to form micropores that adsorb odors, toxins, and harmful chemicals in the air. Additionally, the specially designed breathable bags allows effective air filtration and toxin adsorption. Simply choose a strategic place for the bags for best coverage.