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This valved mask is NIOSH approved and meets 42 CFR 84 requirements for protection against solid or liquid particles (excluding those containing oil). The contoured aluminum nosepiece can be shaped for personal adjustment. Features include a hypo-allergenic micro-fiber filtration media for enhanced protection, a soft, non-irritating lining, a comfortable inner foam nosepiece, pre-stretched durable head straps, and high quality materials and molding process which improves the collapse resistance of the shell when worn. 10 masks per box. 12 boxes per case