The new DuraFlex Flexible Partials are constructed from state-of-the-art thermoplastic material, which makes them easier to adjust. Adjusting DuraFlex won’t gum up your tools, and as a result you have a partial that’s easier to adjust, easier to polish and has better color stability. Produced by Keller Laboratories, DuraFlex is offered in three translucent shades, allowing the natural tissue color to show through for lifelike esthetics.