The aramid fibers used in Nomex coveralls garment construction provide superior flame resistance. The fibers will not melt, burn, drip or support combustion in air.
Garments of NOMEX® aramid fiber have been used for more than 30 years for protection against fire related personal injury. During this time, the line of Nomex coveralls and related Nomex apparel have been expanded and improved to include products made from fiber blends, such as blends of NOMEX® with KEVLAR® and static-dissipative fibers. The family of NOMEX® aramid fibers include:

- 100% NOMEX® T-450, which is used in it's natural, undyed state or dyed for sewing thread;

- NOMEX® III, a blend of NOMEX® and KEVLAR®;

- NOMEX® IIIA, a blend of NOMEX®, KEVLAR® and a static dissipative fiber; and

- Producer- colored NOMEX®, which is supplied in a blend with KEVLAR® and may also be supplied with a static-dissipative fiber.

Properly dyed and finished garments of NOMEX® are inherently flame resistant. No laundering procedures are known to remove the flame resistance of Nomex coveralls. However, thermal protection can be compromised by the presence of flammable contaminants on the garment, or on the fabric from which it is made. Even though garments of NOMEX® are inherently flame resistant, flammable contaminants on the garments can ignite and burn until consumed, thus increasing heat transfer to the wearer