It’s 5 layer PM2.5 air mask breathing filters.Replace the fliters every week of uses,but need to according to your actual situation.Protect your mouth and face from gases, noxious smells, pollen, smoke, dust and other harmful particles.
For Adult mouth mask insided with fliter.
Material: PP anti-sticking cloth + meltblown cloth + activated carbon cloth
Uses: anti-odor, anti-dust, anti-gas, anti-bacterial, anti-PM2.5
1PC PM2.5 filters Or 2 Pcs or 10 Pcs or 20 Pcs