Stay safe with this 4-Ply disposable face mask from Result. Sold in boxes of 50 masks, one size fits all and the KN95 mask conforms to EN149: 2001+A1 2009 FFP2 CE. The Filter efficiency of the KN95 mask is 95%.Box 50 masksRegulation 2016/425Filter efficiency 95%Conforms to EN149: 2001 + A1 2009 FFP2..