Reliable, reusable masks that will shield you from workplace heat hazards. This fire-resistant mask defends well against heat hazards such as flash fires and sudden flames. An anti-bacterial inner layer makes it suitable for blocking microbial hazards. Made of Nomex IIIA fabric, renowned for its comfort, fire resistant and moisture wicking properties. Suitable for utilities, manufacturing, oil & gas and chemical industrial work. Notice for use: *Wash the mask frequently to ensure that no greases, oily soils or other flammable contaminants are present during use. * Ensure that the masks are clean and in proper condition before each wearing. * Retire any mask with visible holes, rips, and/or tears or contamination from flammable materials.