ASTM - American Society for Testing and Materials
Footwear - E Shock Absorption in heel
Footwear - FO Oil resistance outersole
Footwear - HI Heat insulated
Footwear - HRO Heat resistant outersole
Footwear - P Perforation resistance
Footwear - Protective toe cap
EN 20345 SB
SRC Slip resistance
Footwear - WRU Water resistance of upper
Footwear - M Metatarsal protection
EN 20349:2010 – Footwear protecting against thermal risks and molten metal splashes as found in foundries and welding