Dura-Mesh® shell resists collapsing in heat and humidity. Molded nose bridge seals easily without a metal noseband. Facepiece is naturally contoured without pressure points. Straps are securely attached so they don't break at seal. Softspun® lining for increased comfort and durability. Soft foam nose cushion for added comfort. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2009 Section 7.11.1.