Anti-dust Mask KN95 comfortable for wearing (gentle on skin, soft, breathable) FDA , CE ( SGS ) , GB2626-2019 certificated comfortable for wearing (gentle on skin, soft, breathable) Anti-dust Mask KN95 provides the effect of filtering 95% of particles with a mass average diameter of 0.3 micrometers. BFE , PFE 95% Material : SSS Rating Non-woven , 98~99% Melt-Blown Filter packed individually One box has 30 Big box 32 boxes 54CM*45.5CM*52CM