NORM: 345-1CE MARK: CEREF: (REF 3115) DATE OF PRODUCTION: The month and year will be shown on the pack. SIZE: As per your directions. SHOE SYMBOLSS1: Closed back part, steel toe cap, steel mid sole plate (optional) , antistatic, hydrocarbon resistant outer sole and shock absorbing heel. S2: Water resistantS3: Resistance to penetration from sharp objects. (optional) OTHER SYMBOLS COMMON TO THE THREE STANDARDSA: Materials and structure designed to dissipate static electricity changes. C: Electrical resistance less than 100KohmE: Heels designed to absorb energy due to impacts of up 20 joules. P: Steel mid sole to withstand perforation forces of up to 1, 100 new tons (optional) HL: Foot wear insulated against heat designed to slow down temperature build up less than 22. c. CL: Foot wear insulated against heat designed to slow down temperature build up less than 10. c. WRU: Water resistant uppers. HRO: Heat resistant sole.