Safety is the highest priority. For the US market, products must comply with 16 CFR Part 1610 and 1615/1616, which regulate flammability standards for children's sleepwear. For the EU market, compliance with EN 14878 is mandatory. Additionally, ensure all materials are OEKO-TEX® Standard 100 certified to guarantee the absence of harmful substances like formaldehyde and heavy metals. Always verify that small parts like buttons or bows meet pull-test requirements (e.g., ASTM F963) to prevent choking hazards.