1. Metal free hair flocking, keeps rust from your mouth 2. 40 percent hair volume improvement, more efficient 3. 3D curved brush hair design, fits the teeth and cleans deep 4. Polished brush hair, protects your gum 5. Dupont Staclean 0.152mm soft brush hair, UV light disinfection process and vacuum package, safe to use 6. Snap in design, easy to install
