Ergonomic Moso Bamboo Handle The human hand has evolved to grab branches, so we designed our brush to have a round handle mother nature would approve of! It has a slightly larger circumference than a standard toothbrush which makes it great for injured or elderly hands too. Made of fast growing Moso Bamboo which grows up to 3 feet a day! The rapid growth of Moso bamboo means that it is excellent choice for sequestering CO2. Moso is also NOT a food source for orangutans, it is not harvested from the wild. Bamboo Based Nylon-4 Bristles Provide a deep and gentle clean while also being biodegradable. Studies have shown Nylon-4 to biodegrade in soil, municipal waste treatment conditions and to degrade in seawater. While Nylon-4 is not perfect it is a huge improvement over conventional plastic brushes which take up to 1,000 years to break down and are not usually recycled. Charcoal Infused Bristles A tasteful stripe of charcoal infused bristles look cool and help remove gunk and bacteria from teeth!