Mammoth xC Air Purifier HEPA Carbon xC Filter (Only for xC Model) Mammoth Air Purifier OEM Filter Direct Replacement of Mammoth xC - 7 Stage Air Purifier Mammoth Ice-Tech filter is made with the high efficiency materials to improve air flow and filtration. Filter is combined with - 99.97% HEPA Filter, Odor Absorbing Carbon Filter, and Photocatalytic Oxidation Filter VOC and Ozone Free