Passive Activated Carbon Air Filter/Air Freshener in decorative black brocade fabric bag. * Each attractive brocade bolster contains a 450 gram packets of bamboo charcoal granules. * Bamboo Charcoal helps improve indoor air quality by absorbing and trapping odors, allergens, and harmful VOCs. * Re-usable for years, just place in bright sunlight for a couple hours twice a month to renew odor absorbing capability of the charcoal. * The activated carbon in these air fresheners is derived from environmentally friendly bamboo.