Beyond the hard rules, there are things that matter for your peace of mind but aren't legally mandated. Think of these as nice-to-haves:

• Ingredient list: Some brands voluntarily list all ingredients. This helps you know what you're inhaling.
• Manufacturer info: A compliant product will have a way to contact the company. If it's missing, that's suspicious.
• Batch numbers and expiration dates: These help with quality control and recalls.

These aren't required by law, but they show a brand is transparent and cares about its customers.