Depending on the target market, you must prioritize REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) compliance for the EU to ensure no hazardous substances are present. For the US market, CPSIA compliance is vital if the fabric is used for children's products. Additionally, look for OEKO-TEX® Standard 100 certification, which guarantees the textile is safe for human use. If the fabric is intended for outdoor or industrial use, request UV resistance ratings (AATCC 183) and Flame Retardant certifications (such as NFPA 701 or BS 5852).