This image depicts a still life composed of two N95-type face masks, or respirators, at left, one turquoise (foreground), the other white. On the right, you’ll note a third respirator, a N100-type mask. The N95 respirator works as an air-purifying respirator (APR), also known as a filtering face piece respirator, and is certified by the National Institute for Occupational Safety and Health (NIOSH). The N95 is designed to protect against particulate matter such as dust, fumes, mists, aerosols, and smoke, as well as biological particles, including pollen, mold spores, bacteria, viruses, animal dander and allergens. It is also able to filter aerosolized droplets, in particular, smaller droplets which evaporate to form droplet nuclei.