FFP2D protection level ("D" - masks have passed the Dolomite clogging test. Better breathing resistance for longer). Duramesh: Due to the Duramesh structure Moldex masks are strong and durable, reducing comsumption. ActivForm: The ActivForm seal automatically adjusts to different face types and their movements. Foldable, with Ventex-valve - reduces moisture and heat, keeping the mask as cool as possible. Supplied in packs of 10. Standard: EN149 2001 FFP2 NR D.