KN95 MASK Fast shipping to the U.S. about 8-12 working days!!
Standard KN95 Masks means filtration >=95%, this protective mask can filter 0.3um non-oil-based particles, protect you from dust, smog particle, pollen,pm2.5 air pollution and most the viruses in the air, especially fit for you to stay from the COVID in this time.
According to the research of the 3M company, this protective dust-proof kn95 mask is roughly equivalent to the N95 mask and FFP2 mask. The filtration of them is both more than 95%. However, this KN95 mask is not a medical mask so that you should not wear it in the hospital or for medical use.