Features: 100% PVC-Free. Added carbon layer helps filter out nuisance levels of ozone and organic vapors (less than OSHA PEL). Can be used against most welding fumes (free of oil). Exhale valve lets workers breathe easy and stay cool. Exclusive Dura-Mesh® shell resists collapsing in heat and humidity. Molded nose bridge with soft foam nose cushion increases comfort. Softspun® lining for increased comfort and durability. Facepiece is naturally contoured without pressure points.