f.e.t.e.™ (from earth, to earth) Natural Bamboo Interdental Brushes are biodegradable. They feel great on your teeth while also contributing to less waste in the environment, giving you one more reason to smile. NATURAL & VEGAN These bamboo interdental brushes are an ideal replacement for your plastic version and help combat the issue of waste in the environment. Make your switch today to begin your plastic free journey. Why switch to bamboo? Bamboo is the world's fastest naturally renewing resource which is also inherently anti-microbial, anti-fungal and anti-bacterial. Bristles are derived from 63% plant material (castor oil) and nylon. You might even feel a sense of relief knowing you are positively contributing to safeguarding and protecting the environment in which we all need to live. They are the perfect addition to your wellness routine.