Humble Brush – the world’s most sold bamboo toothbrush for adults.  Eco-friendly toothbrushing Humble Brush has a handle made from 100% biodegradable, sustainably-grown bamboo The bristles are soft and made from 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. Go Humble, Give Smiles – Every Humble purchase goes towards funding oral health projects for children in need. Ingredients Handle is made from 100% biodegradable, sustainably-grown bamboo. The bristles are made of nylon-6 bristles.