Humble Brush is a toothbrush that will clean just as well and last just as long as your regular plastic toothbrush, with the added benefit of being better for the environment. With a 100% sustainable bamboo handle. socially responsible toothbrush choice Nylon-6 bristles because it has a lower hardness (which is good for your teeth) and a lower water absorption (which is good for keeping your brush hygienic) compared to other types of nylon It's a strong, durable and hygienic synthetic material Bristles are produced by DuPont, the first major manufacturer of nylon bristles with over 70 years of experience