PureAir N99 Mask Filter

Filter for PureAir mask - FF.P2

It does not have plastic outlet valves, you have to change them from the used, already owned filter. Instructions on how to replace the valves can be found here.The Lekko PureAir mask replacement filter will provide certified superior protection against airborne hazards. The mask filter consists of two layers: activated carbon and FF.P2 nanofiber filtering particles as small as 0.3 microns in diameter. Such a fine mesh of the filter allows to stop not only fine particles PM10 and PM2.5 which are the components of smog, but also dust, mites, pollen and biological threats. Non-woven filtering fabric has been tested by Nelson Labs, the protocol of the tests can be viewed HERE.Durability and effectivenessThe filter lasts for 60 to 90 hours of continuous exposure to smog (at a concentration of about 100 aqi). This is equivalent to wearing the sling every day for 2 hours at high smog levels for a month. After this period, we recommend replacing it due to the water vapor in the exhaled air, which in the long term can create an environment conducive to microbial growth. Replace it regularly to enjoy unparalleled protection.