Can jackets be worn over FR clothing?
The outermost layer of clothing must always be flame resistant. Wearing highly-flammable garments (such as nylon parkas, for example) over FR clothing greatly compromises the overall protection of the FR clothing. Even though the underlying FR garments will not ignite, the flammable jacket can become a combustible fuel source that can still severely burn the wearer through contact with the flames or heat transfer through the FR fabric.
