Do not use!!! Damaged teeth after 1 use!
Had used the official Crest 3D strips before and was really pleased with the results. Be warned, these are NOT the Crest strips, they are knock offs with a small tube of Crest toothpaste provided to con you in to thinking they are. I used these once this morning for the suggested time of 30 mins and I have several apparent and awful looking white spots on my teeth. They are not uniform, they are clear and obvious white spots quite large in size and on 3 of my teeth. There is no way that with more use these will blend in with the further 'whitening', these areas have been damaged by something in this rubbish. I never had this experience with the official Crest strips and can't believe I have caused damage to my teeth with these rip offs after one use.
Avoid if you genuinely care about your teeth. Gutted I used them.
Verified purchase: YesCondition: New