This respirator is suitable for most welding applications. The exclusive Dura-Mesh® shell protects the filter media so it stays cleaner-looking longer. The shell resists collapsing, even in heat and humidity, so the respirator holds its shape longer. The result is, fewer respirators used and lower costs. The contour molded nose bridge with soft foam nose cushion provides the wearer an easy, comfortable fit. There's no metal noseband to adjust and the seal is maintained without pressure points. Softspun® lining gives added comfort and durability. Flame retardants are added to decrease the flammability of the shell. For areas with an oil mist, use an R or P respirator.