This Nano Filter mask is reusable and good for everyday use. It passed all the necessary standards to prove that it is safe to use. On top of that, this AirQueen Nanofilter Mask is cost-efficient given the fact that it can be used up to ten (10) times without compromising your safety. Its efficiency rating is >96%~99.96%

AirQueen KF94 NanoFilter Reusable Face Mask