Introducing the Philips NanoProtect 5000 Series two-in-one HEPA Filter - the perfect solution for those seeking effective and efficient air purification. This filter is designed to remove pollutants as small as 0.02 um, including fine dust, pollen, dust mites, bacteria, and even some viruses. With a surface area of 1.17m² when unfolded, it ensures high-capacity filtration to reduce allergen exposure and protect against allergy symptoms.