Read the wiiki about FFP standards and tests
https://en.wikipedia.org/wiki/FFP_standardsFFP1 is cause it needs to pass a specific paraffin oil aerosol test which other countries/regions don’t bother when testing their kn95 or n95. It also does not apply to the purposes we are using the mask for …
“However EN 149 test requirements differ somewhat from the U.S./Chinese/Japanese standards: EN 149 requires an additional paraffin oil (paraffinum perliquidum) aerosol test and it tests at a range of different flow rates and defines several associated and permissible pressure drop levels.”
Down below at the wiki under similar standards it states KF94 is considered as FFP2
“ South Korea (KMOEL - 2017–64): considered identical to pre-2009 version. FFP1 is called "2nd grade" or KF80,
FFP2 "1st grade" or KF94, and FFP3 "special grade" or KF99.”
Think Korea is very strict about what they can put on their packaging claims. Like the FDA is removed after first batches so maybe they can’t put FFP or FDA claims on their packaging anymore.
If you wear a kn95/n95 with earloop, it is the same or worse as kf94. Must go with the double headbands to achieve the testing seal and results. For comfort, breathability and ease i still choose kf94 and earloop 3m as it is better than someone wearing surgical or cloth mask/buff (like in US ppl still wear cloth mask wtf or delivery riders all just use buff now).