To ensure environmental and safety compliance, prioritize suppliers with OEKO-TEX® Standard 100 certification, which guarantees the yarn is free from harmful substances. For sustainability claims, verify the FSC (Forest Stewardship Council) or PEFC certifications to ensure the wood pulp is sourced from responsibly managed forests. If you are targeting the European market, look for the EU Ecolabel. Furthermore, ensure the manufacturer follows a closed-loop production process, where more than 99% of the solvent (NMMO) is recovered and reused.