GT FLEX ® GREEN is 100% free from traditional, petroleum-based plastics.
In material science, a “plastic” is just a special type of material that can change shape when heated and then keep that new shape when cooled.
That’s it. There’s nothing in the basic definition of “plastic” that says the material must have toxic ingredients or generate long-lasting microplastics. Those generalized concerns are tied to a specific type of plastic – traditional plastic – and stem from the petroleum-derived components used in traditional plastic.
Under the basic, material-science definition, GT FLEX ® GREEN would actually be considered a “plastic” type of material. It needs those cool shape-changing features to be usable for retainers, aligners, night guards, and the like. But it contains none of the petroleum-derived components (nor the related helper chemicals like BPA or phthalates) that are responsible for the growing concerns with traditional plastic.