Outside air flowing through the vehicle"s ventilation system can expose passengers to road dust and pollen. FRAM Fresh Breeze Cabin Air Filters can filter 98% of these contaminants (particles ranging from 5-100 microns). Each FRAM Fresh Breeze Cabin Air Filter contains Arm & Hammer backing soda and carbon which are embedded into the filter to absorb odors and freshen the air. The model number for this item was formerly FCF8644A.