Melts handmade by Yvonne in fragrance of your choice. All melts are made from 100% natural soy wax. All of our fragrances are composed of approved natural, naturally-derived, and specialty aroma ingredients. All of our fragrance materials have been studied by RIFM (Research Institute for Fragrance Materials) for safety, and IFRA (International Fragrance Association) and approved with a code of practice for use of the materials. This ensures that all the fragrances we use are safe for consumers and the environment.