This is toothbrush is made of Wheat Straw ,(known as Bhoosa /bhusa in hindi) instead of plastic or harvesting bamboo Bristles are made up of Castor Bean Oil infused with Charcoal !! This is toothbrush is certified for Good Manufucaturing Practices (GMP) through UQSR.One of the most sustainable toothbrush you can find currently.100% compostable.