The moldex pack of 20 ffp3 nr d classic series valved masks dual purpose and ideally suited to most industrial applications the loop strap makes it easy to put the mask on and take it off the mask has dura mesh for optimum shape retention and durability the activ form seal automatically adjusts to different face shapes and sizes with no need for metal nose clips the ventex valve reduces heat and moisture ffp3 nr d for protection against harmful and carcinogenic dusts fumes and aerosols based o