About this item Once-a-day treatment – 15-20 minutes – whitens teeth up to 9 shades. Just 7 days to complete 1 treatment. See results in as soon as 3 days. Half the wear time compared to other 30-minute wear strips. Enamel-safe and specially formulated for sensitive teeth. Designed to wear any time anywhere, even while sleeping..Strips dissolve, so there’s no messy residue or sticky strips to remove..Special conditioning agent extends results and smooths teeth..Flexible wear options (1 complete treatment [once a day for 1 week]), Weekly maintenance [1 application once a week], Monthly whitening routine [1 complete treatment once a month])..Touch-ups (whenever whitening is needed)..Safe to use for up to 14 days straight for stubborn stains.