Protects teeth from the effects of Acid Wear Re-hardens and strengthens enamel Protects against cavities Keeps mouth feeling fresh and clean Suitable for sensitive teeth Sensodyne Pronamel Extra Freshness is formulated to protect teeth from the effects of Acid Wear, as it re-hardens and strengthens your enamel every time you brush. It's a daily toothpaste, it cleans and freshen plus helps you to keep your teeth healthy and strong.