Box of 20 N95 Dust Masks* N-95 masks remove fine particles from the air and act like a HEPA filter for your lungs. * Whether it is smoke from a fire, dust and smoke from a earthquake or terrorist event, or even airborne infectious particles these masks provide superior protection. *Many people think they are prepared when they apply a dust mask from the hardware store, however those masks let in the fine particles and put your health at risk. *N-95 masks are certified by the National Institute of Occupational Safety (NIOSH) for their ability to filter out small particles. *Everyone should have a box of N-95 masks as part of their emergency preparedness supplies. N-95 Masks Respirators Adjustable nosepiece and inner foam provide a custom seal for different facial shapes Meets NIOSH Standards Box of 20