4 treatments, each with 1 upper and 1 lower strip
Crest 3D White Whitestrips, one of the best and easiest at-home whitening kits around, now comes in a new, more powerful formula! Most whitening strips take 3 days to get a noticeable difference in whiter teeth. Well Crest 3D White 2 Hour Express Whitestrips only takes 2 HOURS for noticeable results! And like all 3D White whitestrips, it is enamel safe and uses Advanced Seal Technology for stronger grip and form fit, easier application, and cleaner removal.
Easy application. These strips have a thicker layer of whitening agent on it than other strips. Within minutes, the strips began to bubble and cover my teeth. If you never tried whitestrips, they can be a little strange. While wearing them, I talk with a lisp. After a couple of more minutes, I could really feel the product working. After the suggested 2 hours, the strips came off easily. My teeth did look whiter. Probably 1 or 2 shades whiter. No drastic changes, but they did work.
By Melanie from Denver on 06-22-11