Acid Erosion Protection with Instant & Lasting Sensitivity Relief (when used as directed)!Acids in everyday food & drink may soften the enamel.Strengthen and protect your tooth enamel from daily wear & tearHow does Colgate* Sensitive Pro-Relief Enamel Repair work?- Remineralizes the enamel & makes teeth more resistant against repeated acid attacks more effectively than fluoride alone- Blocks the exposed channels in acid damaged enamel, that lead to sensitive tooth nerves for instant relief (when used as directed)- Builds a reparative layer that acts like a seal, helping to repair sensitive teeth for lasting protection against sensitivity, with regular use