From this year Flame Resistant balaclavas have become a mandatory item of PPE in all Circuit Racing, and in the Modified Cars, Sport Libre and Racing Car categories in Sprint and Hill Climb.
A reminder that the relevant standards for Flame Resistant Balaclavas can be found in NCR Ch.9 Art.12.3, which specifies that it must be homologated to any FIA standard or be labelled as ISO 6940.
For clarity, if the balaclava is labelled as ISO 6490 it does not also need an FIA certification. However, specifically for an ISO 6940 balaclava, the section of the garment seen in frontal projection must be at least 2 layers of material. Note, there is a forthcoming NCR amendment to clarify that this only applies to ISO 6940 garments, and FIA homologated balaclavas may be a single layer.