FFP3 NR D PROTECTION. Class 3 high efficiency - fine non toxic dusts, fibres, aqueous mists and oil based mists. APF:20 X workplace exposure limit. Guide to protection: Brick, concrete, ferrous metal fum, MDF hand tool, plaster, rockwool, sandstone, silica, hard wood & soft wood dusts. (NR) Single shirt use. (D) Meets the clogging resistance requirements, able to resist clogging in fine dust environments.