The 2400 N95 Particulate Respirator can be used to protect against most non-oil welding fumes and to give relief from nuisance levels of organic vapors and ozone (O3). The Dura-Mesh® shell has added flame retardants to help reduce flammability. The natural contour of the facepiece maintains a good seal without a metal noseband. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003 Section 7.11.1 Also meets NIOSH 42CFR84 Standard.