The SM-98-IIR is a medical face mask type IIR and is intended as a medical device for healthcare professionals and persons working in contact-based professions. Wearing the face mask protects contacts from microorganisms coming from the wearer. The mask helps reduce exposure of your saliva and respiratory secretions to others. In addition, this masks is designed to help block large-particle droplets, splashes, sprays, or splatter that may contain germs (viruses and bacteria), keeping it from reaching your mouth and nose. This face mask is for single use, for up to 4 hours.