The Purolator PBC38173 Premium Cabin Air Filter is engineered to enhance the air quality within vehicle cabins, effectively capturing a wide range of airborne contaminants. Designed for specific Chevrolet, GMC, and Cadillac models, this filter measures 9.8" in length, 9.17" in width, and 1.18" in height, ensuring a precise fit for optimal performance. The filter's triple-layer protection includes an antimicrobial layer that prevents odor-causing bacteria and mold growth, an activated charcoal layer that absorbs odors and gases, and a highly efficient particulate layer that blocks up to 99% of fine pollutants such as road dust, brake dust, soot, pollen, and other inert allergens. This comprehensive filtration system not only improves HVAC and defroster performance but also contributes to a fresher and cleaner cabin environment. Regular replacement of the cabin air filter is recommended every 12 months or 12,000 miles, or more frequently in harsh or dusty environments, to maintain optimal air quality and vehicle performance.