The reusable face mask contains 2 replaceable PM2.5 Activated Carbon Filters (ACF). The masks are washable, but not the filters. With the filter, the mask protects against gases, odor, pollen, haze, dust, smoke or any particulate matter with diameter of 2.5 microns(one millionth of a meter) or less (about 3% of the diameter of a strand of hair). Respiratory droplets are at least 5 microns in diameter.
The mask will hold a PM2.5 filter made of 4 layers of high technology filtration.
The middle layer of the filter is the activated carbon filter. Activated carbon layer is super important. It was originally invented by the UK Ministry of Defense. It was then extensively developed and made into a product for use in chemical, biological and nuclear warfare protection, of the type used by armed forces around the world.
On top of the ACF layer is a layer of melt-blown cloth for extra protection and filtration. And these two layers are enclosed by the outermost layers that are made of non-woven cloth.
The pack contains one reusable washable cotton mask in black and two PM2.5 ACF filters. However, our masks/filters are not approved by FDA and therefore cannot be used in a medical setting. Medical device registration required.
The mask's adjustable wire nose bridge adjusts to each person's nasal height and shape for a tighter fit and better seal. It's stretchy and adjustable ear loops adjusts to fit most adults and children.
The mask is designed not to have the air valve feature as the air flowing outwards through the one-directional valve is not filtered. The air would escape without going through the filters. If one is sick, they could release their respiratory droplets into the public airway, which is not good for protecting others.