Ultra Soft Toothbrush Bentodent Bamboo Toothbrush (Normal) has an ergonomically round bottom and soft bristles. The handle is made from organically grown, sustainable, biodegradable, and antimicrobial bamboo. Bentodent Bamboo bristles are nylon, arguably the best quality and most trusted bristle available. Bentodent Bamboo round bottom tooth brushes are "Dentist approved, Mother Nature...