NOTE - we sell several brands of KN95 which may appear differently. Both KN95 and N95 stop 95% of particles >0.3 microns in size. Help your customers and employees stay safe and healthy during these harsh times. Hanging ear design helps effectively seal the mask and prevents bacteria, viruses, and more. Made with 5 layers of cotton and non-woven meltblown Cloth. The multi layer filtration system effectively prevents a series of viruses and airborne pollutants.