Flat 3-piece design, foldable, with exhalation valve, high wearing comfort, simplified storage and transport in hygienic individual packaging. Approved against respirable fine dust up to 10 times the limit value. Filter class: EN 149:2001 + A1:2009 FFP2 / V NR D. Application: Particularly suitable in work areas that are warm or have high humidity, e.g. in woodworking, when sanding stone and metal and when handling glass and mineral fibres. Further technical properties: up to 10 times the limit value. 9300 series masks with Cool-Flow exhalation valve - for greater comfort. The patented cool-flow exhalation valve ensures a cool climate under the mask and prevents heat build-up.