Exclusively designed for Air Touch V3 Air Purifier. 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 99.99% of allergens and microscopic pollutants above 0.3 microns including PM2.5 and pollens. 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.