This premium filter uses multi-stage filtration to catch particles as small as 0.3 microns. The activated charcoal layer is specifically designed to absorb harmful gases and unpleasant smells from outside traffic. By keeping the air inside the cabin clean it helps reduce allergies and respiratory irritation for passengers. It also ensures the air conditioning blower stays clean maintaining optimal cooling efficiency. It is a direct fit for the factory filter housing and should be replaced every 10 000 km.