Buyers must ensure products comply with regional safety regulations. For the US market, sandals must meet ASTM standards and be free of restricted substances under California Proposition 65. For the EU market, compliance with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) is mandatory to ensure no harmful phthalates or heavy metals are present. Additionally, look for suppliers with ISO 9001 (Quality Management) and BSCI (Business Social Compliance Initiative) certifications to guarantee ethical production and consistent quality.