ProNamel is specially designed to help re-harden precious, acid-softened tooth enamel. SLS Free. Contains 5% potassium nitrate for sensitivity protection and 0.15% sodium fluoride for cavity protection. #1 dentist-recommended brand for strengthening and protecting enamel.- Sensodyne Pronamel Kid's Toothpaste, Berry Twist, 4.0 oz. Tube, 12/cs (Available for sale in US only) (Products cannot be sold on Amazon.com or any other third Party sites.)