Activated Carbon is widely recognized as effective methods of removing and preventing odor/fume buildup in recirculated air. Utilizing the finest quality coatings, 3.2 ounce non-woven polyester is impregnated 150% with finely ground activated carbon coatings, and heat set to retain those coatings when the media is rinsed or vacuumed. Just as a sponge soaks up water, activated carbon adsorbs organic based odors. When the media becomes saturated, the filter is disposed of and replaced with a new panel.