The Naturelle latex is not treated with an added fire retardant. It is approximately 92% pure latex with the other 8% being synthetic latex. Synthetic latex is an oil-based product comprising mainly of polyol and is in all latex products as it is designed to help with the foaming of the product and also to provide an even feel to the product in regards to no lumpiness or soft spots. It will also extend the lifespan of the product. 92% is about as high a purity as you will find. Please contact us for more information.