Patented wave design allows for easier breathing due to increased airflow in and out of the respirator. Exclusive Dura-Mesh® shell prevents collapse from heat and humidity, so mask last longer. Features soft full face foam flange for the ultimate comfortable fit. SmartStrap® is adjustable and allows the mask to hang from the neck when not in use. Unique FlexFit® design moves with your mouth for comfort all day long. Added carbon layer helps filter out ozone and organic vapors. Suitable for most welding fumes (free of oil). Metal-free. Fits easily under welding hoods.