The handle is made of MOSO bamboo, an environmentally sustainable material. Bamboo is the fastest growing plant on earth, once cut back it grows back.. and fast ! Bamboo is naturally sterile and anti bacterial and because of this, there is no requirement for pesticides to be used during its growth. If one person was using this box, it would last them one WHOLE year if they replace their toothbrush every three months as recommended by dental experts. A bamboo toothbrush will work in exactly the same way as a conventional plastic toothbrush. Cruelty Free. Vegan Friendly. BPA Free Nylon Bristles - Medium The bristles are made from BPA Free nylon and are currently not compostable but can be recycled as plastics. At end of life you can reuse your toothbrush in many different ways, for example, as a cleaning brush, paint stirrer or anything you need to get into those nucks and crannies with ! (Not sure if these are real words, but hey, you get my drift …. reuse reuse reuse !)