Our teeth cleaning strips are made from glycerin, propylene glycol, and silicone. Designed to make teeth look shiny and reduce the visibility of stains. Easy to use: peel off the adhesive tape with clean, dry hands. Attach the shorter strip to the lower teeth and the longer strip to the upper teeth. Wear for 30-60 minutes. Remove and dispose of these strips; no need to brush teeth (You can rinse your mouth as needed). And it can help maintain healthy tooth enamel