The mouthpiece is made from silicon with nylon bristle pads. Thanks to this supple material, when Willo is brushing your teeth, the mouthpiece contracts and relax on your teeth, rubbing the bristles against your teeth and along your gumline to sweep away plaque. Cleaning solution and water are injected and vaccuumed from the mouthpiece during brushing to wash away the debris — no need to spit!
To get good results with Willo, you need to select the right mouthpiece size. In order to do that, please check the article on how you can find the right fit.