It can filter 95% or more of non oil based particles and aerosol particles.
5 layers of protection and efficient filtration. Two layers of non-woven fabric, two layers of melt blown fabric and one layer of hot-air cotton fabric.
The valveless mask has higher filtration effect and higher air tightness. So it can give you more protection.
After the test, all filtration efficiency indicators were higher than 95%. GB / 2626-2006 standard
Wide range of uses: outdoor, parties, schools, shopping malls, stadiums and other people can use.