Why does most toothpaste burn and irritate It doesnt have to hurt to be effective, like youve come to expect. With CloSYS toothpastes you can protect your mouth from harmful bad breath germs and freshen your breath without the painful burn. CloSYS Sensitive toothpaste comes with the American Dental Association seal for reducing cavities. This gentle but powerful toothpaste is perfect for all ages because its patented formula is sulfate free, pH balanced and so gentle youll actually use it longer for better results. A 2 minute brushing in the morning and evening followed by a 30 second rinsing with CloSYS mouthwash, is all it takes to get great results. CloSYS Sensitive toothpaste strengthens enamel and reduces cavities while it freshens your breath. Nothing overpowering or painful. Just a clean, fresh, soothing toothpaste youll actually use, because CloSYS is the Gentlest Oral Care Ever.