Household dust. Pollen. Pet dander. Smoke & smog particles. PM2.5. Airborne germs. Designed for men & women. Filter media filters greater than or equal to 95% of airborne particulate matter (At least 95% filtration efficiency against solid and liquid aerosols that do not contain oil. This respirator (3M Aura 9211+)is NIOSH N95 certified for filtration efficiency). Do you know what's in your hair? It's important to understand the quality of the air we breathe. The US Environmental Protection Agency calculates an Air Quality Index (AQI), which can be thought of like a daily weather report and can help us know when to take action for better health. 0-50 good. 51-100 moderate. AQI Action Days: 101-150 unhealthy for sensitive groups; 151-200 unhealthy; 201-300 very unhealthy; 300-500 hazardous. For further information on AQI visit www.airnow.gov. When to Consider Wearing a Respirator: Understanding the AQI: The AQI is based on multiple major air pollutants, of which airborne particulate matter is just one component. When the AQI reaches the unhealthy range, it may be from one or several of the pollutants. This product is designed to help filter airborne particulate matter (eg, dust, pollen, pet dander, smoke and smog particles, PM2.5, and airborne germs). You should always follow all guidance from local health authorities regarding air pollution. For more information on this product, call 3M at 1-800-537-2191. For more information on NIOSH certification see the NIOSH approved label on the user instructions. For correct use of this respirator, see the Consumer and Quick Start Guide inside this package or call 3M at 1-800-537-2191. Design Features: Cool Flow exhale valve. Soft foam under adjustable nose clip. Braided headbands. Flat-fold design. Smooth inner material. Not intended for sale outside of the United States. Questions? 1-800-537-2191. Made in Singapore.