Luber-finer CAF24003XL Extreme Clean Cabin Air Filter Keeps your cabin air cleaner and more odor free with Arm & Hammer Baking Soda Effectively traps 98 percent of pollutants, pollen, dust, and exhaust fumes (at 5 to 100 microns) before they reach the interior of your truck cab Extreme Clean HD Premium Cabin Air Filters help you breathe clean air Cabin air filters should be replaced every 12,000 to 15,000 miles or at least once a year Reduces the amount of contaminants entering your breathing space