5-layer FFP2 respirator without valve. The certification is discreetly heat-printed on the mask material. Type NR, which means it can filter inhaled and exhaled air from particles larger than 0.3 microns for 8 hours. Hidden nose clip, comfortable fit. Fits with two elastic straps (hangs on the ears). 20 pieces/box, individually packaged inside the box. EU standard: EN 149:2001+A1:2009.