Cleenaire CAF6411 The Most Advanced Protection Against Bacteria Dust Viruses Allergens Gases Odors, Cabin Air Filter for BMW Seven Stage Patented Protection From Dust, Allergens And Harmful Gases- The Most Advanced Cabin Filtration On The Market Both Sides Of The Filter Are Equally Protected With Activated Coconut Shell Carbon - NO MORE Dreaded Airflow Arrow! Reinforced Framing Surrounding The Entire Perimeter Provides Unmatched Stability And Sealing To Prevent Contaminated Air Bypassing The Filter Deep Pleated Design For High Airflow (1200 mm/s) While Maintaining Superior Filtration This Filter Is Made For Those That Care About The Air They Breathe- Satisfaction Guaranteed