Listerine Smart Rinse is a fluoride mouthwash that helps protect your childs teeth against cavities when used twice daily after brushing. Contains Fluoride, which strengthens teeth & reduces cavities by upto 40% more than brushing alone. Kills bad bacteria, a major cause of plaque & gum disease. Goes arounds the whole mouth, reaching teeth, gums & tongue. It attracts & tints the bits that brushing misses, showing your child the proof is in the sink.