These masks protects you from dust, Fuel based pollutants emmiting from petrol, diesel and gasoline, PM 10, PM 2.5, airborne infectious pathogens, viruses such as H1N1 (Swine Flu), , bacteria, dust, gas pollution and mold, spores or pollen. For daily use when there is pollution, haze, dust or outdoor allergens. Atlanta Healthcare Cambridge masks are respirators that use military grade filtration technology in their construction to enable them to filter out nearly 100 percent of particulate pollution, most residual pollutant gases, also provide protection against cross infection and harmful bacteria and viruses such as swine flu H1N1 in a fashion friendly pollution mask suitable for the whole family. Atlanta Healthcare Cambridge mask technology was developed by UK Ministry of Defence for protection against chemical, nuclear and biological hazards. As well as being one of the most effective anti pollution masks on the market, the respirators are also treated with silver, resulting in nearly 100 percent protection against viruses and bacteria. This makes Cambridge mask the only non disposable pollution mask that has been officially and successfully tested to protect against pollution as well as bacteria and viruses.