Crest 3DWhite 3 Day Brightener is made by the # 1 dentist-recommended at-home teeth whitening brand* and uses the same whitening ingredient used by dentists. This 3-day whitening kit will give you the quick boost you need for a noticeably whiter smile, 100% guaranteed. The Advanced Seal Technology’s no-slip grip means the strips stay put until you take them off, allowing you to talk and even drink water while whitening your teeth. Choose Crest 3DWhite 3 Day Brightener for a whiter, brighter smile in just 3 days.Satisfaction Guaranteed - If you are not satisfied with your results, Crest will send you a pre-paid card in the amount of your purchase. Simply return your receipt and package UPC within 60 days of purchase. Limit to one refund per person.*In a survey of over 500 dentists from January 12 – April 5, 2023