100% PVC-free, ActivForm®: no nose clip required, proven shape and durable FFP mask, box of 20 pieces, DuraMesh®: strong and durable structure keeps the mask shape-retaining, EN 149: 2001 + A1: 2009 certified, Moldex 255501 classic mask FFP3 NR D, all-round carrying strap for quick, simple and safe installation and removal, Ventex® Klima valve reduces heat and condensation