The worlds FIRST solid bamboo electric toothbrush head Over 2 years in development, our own copyrighted design uses precision engineered sustainably sourced bamboo to create a plastic free head which fits your existing Philips Sonicare* brush. The beautiful bamboo head has medium 100% castor oil bristles which give the same deep clean feeling, and of course like every product we make it comes in biodegradable packaging and has carbon neutral shipping. Each packet contains 2 heads - enough for at least 6 months of brushing.   * Solid bamboo - no hidden plastic core * 100% castor oil bristles * Precision engineered * Fits Philips Sonicare* brushes- no need to buy a new base * Biodegradable packaging * Carbon Neutral shipping * 1% of sales given to 1% for the planet *Our brush heads are compatible with most Philips9 series models. See chart for details.