Airvida L1 is a trendy wearable air purifier with patented double-vent design. This ergonomic design consistently generates 2,000,000 negative ions/cm3, 100 times more than natural forest ion concentration, to purify PM2.5, pollen, and smoke around your face. It weighs only 70g thus very comfortable to wear, with presentable elegance. A perfect solution to improve air quality outdoors or in office, car, restaurant, public transportation, etc.