Sheer White Teeth Whitening Strips have SheerFilm advanced technology to stick and mold perfectly to the teeth becoming almost invisible. Just wear the 20% carbamide peroxde tooth whitening strips daily for 1 to 2 hours to achieve maximum teeth whitening results fast. Not only are they comfortable to wear during any activity (including talking or even drinking cold beverages!), but they also cause little to no sensitivity with their 20% carbamide peroxide formula. You can experience up to a 5-shades brighter smile!