The EN 397 norm, regarding to the “Industry protection helmets”, demands that the following points has to be marked: Every helmet should carry a mark in flash or well printed with the following indications: a) The number of the present European Norm. b) The name or the data of the fabricant identification. c) The year or the trimester of the fabrication. d) The type of helmet. e) The size or the size chart. Complementary indications, as instructions or adjust recommendations, of assemblage, of use, of cleaning, of disinfection, of maintenance, of review and of storage should be specifies in the instruction use.