An economic and efficient composition of planning '4+3' with 2 types of brushes! The Basics of Healthy Teeth Wipe hidden foreign substances surely with double fine brush, My Denti! Perfectly with Double Fine Brush Composed of 100% double fine brush, it removes the plaque from deep inside the gums. Tongue's Coat Removal By adding a tongue cleaning function behind the toothbrush, it removes tongue's coats which cause mouth smells. Slip-resistant The ergonomic design keeps the toothbrush from slipping.