This International Standard specifies the performance requirements for the limited flame spread properties of materials and material assemblies used in protective clothing in order to reduce the possibility of the clothing burning and thereby itself constituting a hazard. Protective clothing complying with this International Standard is intended to protect workers against occasional and brief contact with small igniting flames, in circumstances where there is no significant heat hazard and without presence of another type of heat. Limited flame spread materials and material assemblies are also used in clothing for protection against heat hazards, when addit