Pinch-free nosebridge eliminates discomfort and readjustment necessary with metal nosebands. Exhale valve releases hot air easier and reduces breathing resistance, which keeps workers cooler and allows masks to last longer. Dura-Mesh® shell resists collapsing, even in heat and humidity. Added carbon layer helps filter out nuisance levels of ozone and organic vapors (less than OSHA PEL). Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003, Section 7.11.1. Made in USA.