OTR Cabin Air Filters have Expertise Built In™, being manufactured at an ISO9001-certified facility that has over 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 the quality of the cabin’s air: keeping dust, mold spores, pollen and pollution at bay. FleetPride is your First Click in Heavy Duty®.