50pcs pm2.5 face mouth mask gasket 5 layer anti flu mask pads mat

features 5 layers of non-woven fabric comfortable to wear, good air permeability. can block most of the odor, dust, debris and otherdirty stuffs in the air etc. light weight, ultra soft, highly breathable, does not contain any harmful substances great to protect your mouth and face from dust, haze, allergies, smoke, pollution, ash, pollen, gardening, crafts. can be optimally utilized in any surroundings, workshop, catering services, food processing, school, beauty salon, public place etc.