evidence: Wearing a mask has general benefits. The main benefit of mask-wearing is that it may keep you from inhaling any respiratory hazards, such as particles of dust or smoke and germs. Additionally, wearing a mask can protect others and reduce the spread of infections if you have an illness. 1. Protects You From Poor Air Quality Wearing a mask can protect your respiratory system and general health when there is bad air quality because of pollutants. Categories of bad air quality range from moderate to hazardous on the Air Quality Index (AQI). The AQI measures levels of the following pollutants with Clean Air Act regulations: Carbon monoxide, nitrogen dioxide, and sulfur dioxide: gases from motor vehicles and industrial processes Ground-level ozone: gas from the atmosphere referred to as smog when it reaches the ground Particle pollution: particles made of sulfate, nitrate, carbon, and mineral dust chemicals 2. Reduces Exposure to Allergens Especially if you have pollen allergies, wearing a mask could decrease allergen exposure. A mask that covers your mask and nose can help filter out pollen or irritants. Masks also change the moisture and temperature level of the air you breathe in, further reducing allergy symptoms. 3.