These 5 Layer Carbon Activated Filters provide the best protection for reusable masks. These premium filters can be used 3-5 times for heavy use. Simple & easy to use, they simply provide the protection you need!
PM2.5 refers to atmospheric particulate matter (PM) that have a diameter of less than 2.5 micrometers, which is about 3% the diameter of a human hair. Particles in this category are so small that they can only be seen with a microscope. They are even smaller than their counterparts PM10, which are particles that are 10 micrometers or less, and are also called fine particles.