Polyvinyl Chloride (PVC) is found in a wide range of household products. The production of this substance produces a very toxic chemical called dioxin. Our erasers are made from synthetic rubber which is PVC and Phthalate-free and a much safer alternative to the traditional eraser. In the United States and the European Union, phthalates are being phased out of many household products due to rising concerns over their effects on health.