PUREFLOW 2007 GMC Sierra Cabin Air Filter with HEPA and Antibacterial Technology, PC9957HX PC5586X This layer is combined with

This layer is combined with baking soda to absorb bad odors

Built to support consistent airflow through your furnace

1st Stage: For drivers and passengers who suffer from severe allergies

Optimal Air Flow: Designed to minimize pressure drop from high-efficiency filtration

97% efficiency

PUREFLOW 2007 GMC Sierra Cabin Air Filter with HEPA and Antibacterial Technology, PC9957HX PC5586X This layer is combined with1st Stage: For drivers and passengers who suffer from severe allergies, PUREFLOW HEPA (High Efficiency Particulate Air) offers 99. 97% efficiency, capturing microscopic pollutants including pollen and other allergens (may result in a minor restriction to airflow). 2nd & 3rd Stage: Activated charcoal adsorbs harmful gases like carbon monoxide and sulfur dioxide. This layer is combined with baking soda to absorb bad odors. 4th Stage: Advanced