PURE cabin filter is the core filtration device of the vehicle ventilation system. It mainly intercepts pollutants such as dust, pollen, exhaust particles and lint in the vehicle outside the vehicle. Its multi-layer structure includes a primary-effect nylon mesh to intercept large particles, a middle melt-blown cloth layer that electrostatically adsorbs PM2.5, and a high-efficiency activated carbon layer that can absorb formaldehyde, sulfur dioxide and other harmful gases. Installed at the air inlet of the air conditioner, it can effectively prevent impurities from entering the evaporation box, avoid air conditioner odor and bacterial growth, and ensure the air quality in the car.