We are crazy about bamboo, but for some, this doesnt scratch their itch. For them, we have gone to lengths to develop the plant-based Humble Brush that both looks and feels like a regular plastic toothbrush while reducing fossil-based plastic by 45 Percent. The handle is made using wheat starch as a key ingredient, and the bristles are made of high-quality, BPA-free Nylon with 65 Percent plant-based materials from caster beans. 45 Percent Plant-based materials BPA-free bristles Recyclable packaging Dentist-approved