Moldex Smart Series FFP3 NR D Non-Valved Mask is a general-purpose mask suited to most industrial applications. The comfort nose seal and ActivForm® automatically adjust to different face shapes and movements, and the strap allows you to hang the mask around the neck during breaks. FFP3 NR D for protection against harmful and toxic dust, fumes and aerosols based on water and oil. 20 x Workplace Exposure Limit. EN 149:2001 + A1:2009.