Mammoth Air Purifier HEPA Carbon Filter (7 Stage, M1000 Purifier) Replacement filter for the Mammoth Air M1000 air purifier Simply remove the old filtering system and replace it with the M1000 IceTech replacement filter The IceTech replacement filter is as long-lasting as it was when you bought the unit Together these filters capture small and large particles, odors, VOCs, bacteria, and allergy inducing airborne contaminants