Purolator noted it manufactures and supplies its premium quality BreatheEasy cabin air filters for most domestic and imported vehicles in North America. When a vehicle’s cabin air filter is clogged, it is unable to allow clean air to enter the vehicle’s ventilation system. Two kinds of cabin filters are available. The particulate filter features a multi-layer design with pleats to filter out pollutants and irritants. The activated charcoal cabin filter goes a step further to adsorb toxic and foul-smelling gases such as ozone, nitrogen oxide, sulfur dioxide and hydrocarbons, keeping odors out of the cabin. Cabin air filters can be installed in anywhere from less than 10 minutes to about an hour, depending on the location. Most cabin air filters come with an illustrated, vehicle-specific instruction sheet to assist with installation.