Your body will thank you once you breathe purified air through the Philips NanoProtect HEPA Replacement Filter FY2422/30. It is specially created to trap 99.97-percent of bacteria, including common allergens, dust, and pollutants. This NanoProtect S3 filter is made of high-quality materials to effectively capture particles as small as 0.3 microns. It features multiple optimised pleats to ensure every bit of air passes through the filter to deliver nothing but purity. Featuring a firm and stable structure, this filter offers high filtration efficiency in the toughest conditions.-White-Size (40x31x8.8)