This bundle includes (4) Adult Bamboo Toothbrushes with Soft Bristles …As the top seller, WooBamboo's Soft bristle bamboo toothbrushes are not only dentist-approved, but also Mother Nature recommended. Like all WooBamboo brushes, these Soft brushes have handles made from a single piece of carved, Sustainably Harvested bamboo, containing no toxins, glues, or paints, sealed with a vegan soybean wax.