Humble Brush Bamboo Toothbrush Kids Various ColoursDentist approved Bamboo Toothbrush for Kids with quality Nylon bristles. Humble Brush has a handle made from 100% biodegradable, sustainably-grown bamboo. The bristles are made of nylon-6 bristles from Dupont. The packaging is eco-friendly, the box and inside wrapper are made from recycled materials, and can be thrown out with the organic trash. This toothbrush is vegan, cruelty-free and verified BPA free.