AirDays KF94 Face Mask Effectively filter out 94% of the 0.4㎛ fine suspended particles in the air. Block droplets, viruses and bacteria from spreading infections , block fine dust and fine suspended substances, protect the respiratory system from pollutants and infectious substances. Three- dimensional locking masks will not make glasses easy from the mist comfortable around the chin design, expanding breathing space, greatly enhance the permeability of high protection force, breathable and comfortable with a variety of Korean certification, safe and effective.