PM2.5 refers to particulate matter in the air with a diameter smaller than 2.5 micrometers, approximately one-thirty-fifth the diameter of a human hair and smaller than human cells. It is classified as a Group 1 carcinogen by the World Health Organization (WHO). These particles originate from multiple sources, including coal-fired power plants, factories, ships, and motor vehicles, and can also form in the atmosphere through photochemical reactions. During Taiwan's winter and spring seasons, air pollution becomes particularly severe due to climatic and geographical conditions. Because of their minute size, PM2.5 particles can enter the lungs through breathing, causing serious health impacts including respiratory diseases, cardiovascular problems, and even increased cancer risk. The Wind & Sun Anti-Smog Mesh utilizes premium Taiwan-made “original-spun water-repellent black mesh” with a specially enhanced static-charged plain weave. Its “static dust-blocking technology” employs physical electrostatic attraction to capture particulate pollutants and fine suspended particles. effectively intercepting pollutants, insects, and even tiny black flies from all angles while maintaining excellent ventilation. Tested and certified by the Environmental Engineering Department at National Chiao Tung University, it blocks up to 90.5% of PM2.5 fine particulate matter. This provides your family with a home environment where they can breathe freely, significantly improving indoor air quality.