KN95 FACE MASK with 4D stereo protection, 5 plies structure, and its tested performance of more than 95% (around 99%). It has CE certificated by SGS according to EN149:2001+A1:2009 FFP2 NR Respirator Mask and is designed for daily protection. Suitable for protection of PM2.5 haze particles, food, chemicals, coal dust, cement dust, metal smelting, and processing For more, see KN95 Face Mask FFP2 CE Certificate Respirator for Worker Daily Protection