Designed to help provide comfortable, reliable worker protection against certain oil and non-oil based aerosols. Lightweight and an excellent choice for work settings that involve heat, humidity and long wear periods. At least 95% efficient against solid and liquid particles, including those containing oil. Available with either nuisance level* acid gas or organic vapor relief. NIOSH 42 CFR 84 approved.*Nuisance level refers to concentrations not exceeding OSHA, PEL or other applicable exposure limits, whichever is lower.