Exhale valve reduces hot air build-up and keeps workers cooler. Dura-Mesh® shell resists collapsing in heat and humidity. Molded nose bridge seals easily without a metal nose band. Naturally contoured facepiece with foam nose flange relieves pressure points. Softspun® lining gives added comfort and durability. Available in three sizes to fit most faces. Flame retardants are added to the shell to help decrease flammability. NIOSH certified to have a filter efficiency level of 95% or greater against particulate aerosols free of oil. Applications:Hot, humid and dusty environments such as welding, soldering and brazing, grinding, sanding, sweeping, bagging, stone quarrying, metal machining, cement, underground mining, polishing, buffing, lime, poultry and textiles. No oils present.