HONEYWELL FF2400 SERIES RESPIRATORS HAVE BEEN DESIGNED AND RIGOROUSLY TESTED FOR SAFETY AND COMFORT. MADE USING AN EXHALATION VALVE, ADVANCED ANTI-COUNTERFEIT FILTER MEDIA AND COMBINATION OF NON-SKIN ALLERGENIC COMFORTABLE FABRICS, IT PROTECTS USERS AGAINST DUST, PM2.5, MICROORGANISMS, OTHER POLLUTANTS AND IS COMFORTABLE FOR ALL DAY USE. DESIGNED TO FIT MOST FACE SIZES AND SHAPES, HONEYWELL DISPOSABLE MASKS PROVIDE EXCELLENT SAFETY AND OUTSTANDING COMFORT