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. **PE**R-1 Warning Respirators are designed to provide comfortable, reliable worker protection against certain oil and non-oil based aerosols. Each respirator is 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. For use in work areas where metal fumes may be present. Available with either acid gas or organic vapor relief. NIOSH approved.