All Woobamboo brushes boast a beautiful, ergonomic handle made from a single carved piece of naturally-grown Moso bamboo, and contain no toxins, glues, or paints. The handles of the brushes are naturally anti-microbial and coated in a natural soy bean wax, making them smooth and safe for oral use! The eco handle is biodegradable and the bristles are dental-grade nylon made from recyclable material. All ink used on the packaging is soy based and the packaging itself is made from recycled materials. Dentist recommended.