0.07 mm ultra fine microfiber bristles remove plaque, food particles, massage gums, and effectively clean the tongue. Spacing washers between bristle layers allow them to rotate, dry quickly and stay clean. Round cylinder heads and micro fine bristles enables brushing with water only. BPA free Lead free Phthalate free Every Baby Needs a Buddy The Difference is in the Bristles Designed for Your Child 4–24 Months Soft