Changeable filter, PM2.5 active carbon filter to stop smog and haze effectively. Both 2 sides of face mask are breathable so as to reduce respiratory resistance, free to breath and free to go forward. Suitable for dust, anti-vehicle exhaust, anti-pollen allergy, PM2.5,for cycling, hiking, skiing an..
Changeable filter, PM2.5 active carbon filter to stop smog and haze effectively. Both 2 sides of face mask are breathable so as to reduce respiratory resistance, free to breath and free to go forward. Suitable for dust, anti-vehicle exhaust, anti-pollen allergy, PM2.5,for cycling, hiking, skiing an..