OTR Cabin Air Filter have Expertise Built In™, being manufactured at an ISO9001-certified facility with more than 30 years of experience making heavy duty filters. Made with the highest quality media and engineered to OEM fit, form and function, the OTR cabin air filter replacement is purposed to improve air quality, keeping dust, mold spores, pollen and pollution at bay. FleetPride is your First Click in Heavy Duty®.