These foldable FFP2 NR masks have an exhalation valve in compliance with EN 149-2001+A1:2009 standard, the masks have been classified as PPE of Category III. They are self filtering masks. These disposable face masks protect against solid and fluid particles and have a filtration efficiency up to 95%. They have elastic ear loops that can be perfectly adapted to the contour of your face without pressing on the skin due to the adjustable head strap. They are more comfortable and safe.