Collapse resistant Dura-Mesh® shell with Softspun® lining lasts longer so workers use fewer masks. Shaped for comfort with contour molded nose-bridge. Seals easily and comfortably without a metal noseband. Certified under NIOSH 42CFR84 to have filter efficiency level of 95% or greater against particulate aerosols free of oil. Flame-retardants added to help decrease flammability of shell. The 2207 is designed for workers with varied facial features. Sold 20 per box.