Cycling Face Mask with Activated Carbon Filter Valves ...
Dec 25, 2020·1 or 2 Packs of Anti-Pollution Sports Face Masks with built-in replaceable 5 layer activated carbon PM2.5 filters. Certified KN95 99%+ 0.03 micron filtration with real electrostatic filter. See images for certificates. Adult-sized masks with longer Velcro straps. Not child-sized masks …