Sensodyne is specifically formulated to relieve dentin sensitivity. When enamel wears away or gums recede, the underlying dentin becomes exposed. This can cause dentin sensitivity upon contact, for example, with hot and cold foods and drinks. 24-hour sensitivity protection* - Prolonged protection from dentin sensitivity* - With foam-release technology - Provides all the benefits of a regular toothpaste* *when brushing teeth twice a day