NIOSH N100 Approved Delivers N100-class protection against airborne non-oil particles ï?§ ANATOMIC The pre-formed and elastic support makes an easier and reliable fit to all kinds of faces. It offers an excellent visual field and great compatibility with glasses. ï?§ EXHALATION VALVE An ultralight membrane concentrates the exhaled air into two zones of maximum aperture, 30% wider than before. With these improvements breathing resistance decreases significantly. ï?§ ARMOUR LAYER It is an external protective layer that ensures the protection of the filtering material from dirt, dust and liquids as well as the normal mechanical stress due to prolonged use thus extending and preserving filtering efficiency and making the device safer.