Honeywell Air Touch P2 3-in-1 Compound Filter with Pre-Filter, HEPA H13 Filter & Activated Carbon Filter is exclusively designed for Air Touch P2 Air Purifier. Single compound filter with HEPA H13 filter on one side and activated carbon filter on the other. Pre Filter captures large particles such as dust, lint, fibres, hair and pet fur at 1st stage and increases life of HEPA H13 Filter. High-efficiency HEPA H13 filter removes 99.97% of allergens and microscopic pollutants above 0.3 microns including PM2.5 and pollens. High-grade granular activated carbon filter physically absorbs formaldehyde, unwanted odours, toxic gases, fumes, smoke, cooking smells and pet odours, as well as filtering volatile organic compounds (VOCs). Anti-Bacterial filter captures viruses and bacteria which are ≤0.3 μm. Not washable, needs to be replaced when filter indicator blinks on the touch panel. Filter Life of Up To 3000hrs or 1 year* depending on the usage and pollution levels. It comes with an additional equipped layer of Pre-Filter which is also the fourth filter.