When sourcing safety shoes, compliance is non-negotiable. You must ensure products meet ISO 20345:2011 or 2022 standards, which define the basic and additional requirements for safety footwear. For the US market, ASTM F2413-18 is the mandatory standard. For the EU, look for the CE mark and specific ratings like S1, S1P, S2, or S3, which indicate levels of toe protection, puncture resistance, and water penetration. Always request valid test reports from accredited third-party labs like Intertek or SGS.