EN ISO 20349-1
Personal protective equipment - Footwear protecting against risks in foundries and welding - Part 1: Requirements and test methods for protection against risks in foundries (ISO 20349-1:2017) EN ISO 20349-1:2017/A1:2020
A European protective clothing standard that carries legal weight: it is harmonised under the PPE Regulation, so a manufacturer who builds to it can CE mark against it.