Respiratory masks are devices used to protect the respiratory system against air pollution and pathogens. These masks are divided into two general categories: Surgical masks: These masks are mostly used to prevent the transfer of germs and viruses to the surrounding environment and are common in medical environments. They prevent droplets containing germs from entering the respiratory system. Filtered masks (N95, FFP2, FFP3): These masks have filters that can filter out fine airborne particles, dust, and pathogens up to 95% or more. These types of masks are used for greater protection in environments with high pollution and during outbreaks of infectious diseases.