KN95 Respirator Face Mask Without Filter

-The use of ultra-fine electrostatic melt-blown cloth composite ES hot air cotton. PP spun-bonded non-woven fabric forming a four-filter layer, more effective filtration of harmful substances.
-The 3D shape is designed according to the engineering of human faces to ensure the tightness and increased the breathing volume of the mask. - This greatly improves air permeability and make the wearing and breathing more comfortable.