Helps provide comfortable, reliable worker protection against certain oil and non-oil based particles including those present with nuisance levels* of acid gases such as sulfur dioxide, hydrogen fluoride, and/or chlorine. An excellent choice for work settings that involve heat, humidity and long wear periods. Suggested applications include glass etching, chemical processing, paper processing, aluminum smelting and brewing operations. Lightweight construction promotes greater worker comfort and may contribute to increased wear time. Meets NIOSH 42 CFR 84 requirements.