We do not apply flame retardants to any of our mattresses. If your concern is about PFAS chemicals, you can read more about it in the following article. We also have a very in-depth page for our Sustainability Initiatives. If you scroll down on that page, you'll be able to see our Restricted Substances List that we hold our material suppliers to as well - it can be found in the "Product Materials and Chemicals" drop down section.