Price is for EACH Mask
Disposable KN95 Mask
Particle filtration efficiency≥95%
Compare N95 v KN95.
In summary, They are extremely similar. They stop 95% of particles >0.3 microns in size.
Both N95 and KN95 rated masks are effective at filtering out at least 95% of particles.
The CDC has stated that KN95 is acceptable alternative due to the shortage of N95.