KN95 face mask with 4 layers of protection that is reusable. It is manufactured from an elastic, skin-friendly nonwoven fabric with electrostatic filtration (The electrostatic charge makes the filters ten times better than uncharged filters at blocking viruses and other particles.). The fabric layer of KN95 grade is very effective at filtering particles bigger than 0.3 microns. KN95 is hypoallergenic, dust-proof, and efficient in removing leftover material. Respirator Particulate for dust, smells, and hazardous particles.