Product Description: Made with biodegradable cornstarchPhilips Sonicare | Click-on handleSustainably produced for everyone who smilesInnovativeEco-friendlyDurableBPA-freeOral Care Reimagined™Plus Ultra is Latin for 'away'. Inspiring innovation and forward-thinking is our motto. We work with experts to deliver the best, always designing with the planet in mind. The Plus Ultra repairable brush head is made from cornstarch, a sustainable material that is durable, biodegradable and fits most click-on handle electric toothbrush bases from Philips Sonicare.