Replacement KN95 Carbon Filters for Neoprene and Cycling Face Masks
The KN95 carbon filters like you N95 mask, it can’t be washed. It is 5-layers with a carbon layer and melt-blown layer. Carbon layers used to filtrate toxic gas and melt-blown layer used filtrate virus like coronavirus. The KN95 carbon filters are the same standard with the KN95 Face mask, which is the standard like FFP2 and N95.
The Filters may work 3-15 days according to the time you use. Considering the coronavirus, you may use it for 3-10 days. But if you use it in heavy dust environments like construction industrial or high-risk areas may infect coronavirus, you may need to replace it in 3-5 days.