Cycling Face Mask with KN95 Carbon Filter for Preventing Covid-19
Replaceable KN95 Filter: The KN95 filters with activated carbon layer and melt-blown layer have the same standard of KN95 face mask, like the FFP2 of Europe and N95 of America..
One Way Breathing Valves: The silicone sheet in the valve close when inhaling and open when exhaling, so it could fliter the dust and virus while breathing easily.
Long Velcro Design: Long Velcro Design make the make suitable for most of adults.
Replaceable KN95 Certification Carbon Filter
Use 2-3 hours per day: replace it in 7-15 days.
Use it in heavy pollution and high risk area of coronavirus: replace it in 3-5 days.