RZ 3-Pack F1 X-Large Replacement Filter

RZ 3-Pack F1 X-Large Replacement Filter?áis the standard filter?áconsisting of two filter layers, the outer particulate filter and the internal active carbon element. The outer layer of the F1 filter is capable of trapping particulates down to .1 micron in size. The inner layer, known as the Active Carbon element is effective towards fumes and odors.?áCombining the two technologies this filter has been laboratory tested to be 99.9% effective.