with our interdental brushes made from sustainable bamboo and quality bristles you can go about your business with a clean conscience. interdental brushes made from plastics is a ghost from the past! our stylish alternative, with a handle from 100% sustainably grown bamboo and with quality nylon bristles from DuPont, provides an easy and practical alternative to flossing. The Humble Co. Bamboo Interdental Brush Size 4 Yellow