Refreshes gums during and after brushing. Mild flavor. Oral-B Calm Original Sensitivity & Gum Toothpaste reduces sensitivity and soothes gums. It is formulated with Activcalm technology, which forms a protective layer that relieves sensitivity and creates a feeling of comfort. The Activcalm technology in Oral-B Calm Original Sensitivity & Gum Toothpaste: Instantly relieves sensitivity by creating a protective layer. Refreshes gums during and after brushing. Creates an intense feeling of comfort thanks to its soft foam.