5 Layer PM 2.5 Filter

The PM2.5 replaceable face shield filters finer dust and particle and protects the face and lips from contact with another thing. The pm2.5 face shield filter is composed of 2 layers of non-woven fabric, 2 layers of meltblown cloth and 1 layer of activated carbon cloth. A Multi-layer replacement air filter gives you. The compatible replacement air filter contains activated carbon, which can effectively prevent haze, car exhaust, pollen, and while letting you breathe fresh air.