This mask is recommended by 3m for protection against influenza virus severe acute respiratory syndrome. This new generation of respirators provides comfort and style without compromising performance. Reliable, effective protection agaist fine particulates. 3m cool flow valve reduces heat buildup to offer comfortable protection, particularly in hot and humid conditions. Approval ce marked. Maximum use level assigned protection factor 20 x oel nominal protection factor 50 x oel. 3m 9332 masks are approved to en1492001 ffp3.