Its about rules when discussing the face mask. The reality is that the face mask does not carry an SFI spec/rateing and the goggles have glass lenses. other issues come to fitment to your head. With the extra padding in the forhead area, some of the foam liner in the helmet has to be removed in order to get the helmet to sit properly to the drivers head and most new open helmets worthy of raceing with have cheak guards and thaose interfere with the filters--These mods violates the helmet spec/rateing and tech will bounce you if caught. If you dont do the mod, then the helmet sits over an inch above your head and the chin strap becomes too short also, Scary deal in a crash