• DISPOSABLE DUST-PROOF FILTERING FACE PROTECTIONSThis type of protection is efficient against non toxic dusts and in a few cases, also against, toxic and injurious dusts. Their proper use requires a clean and shaved face.• DUST-PROOF FILTER MASKSThis type of protection (which may be a half-mask or a complete face mask, with or without blower) is used to remove the finest and most dangerous particles from breathed-in air.