Get Professional-Level teeth whitening at home with Crest 3DWhitestrips Professional Results. Brought to you by the #1 dentist-recommended at-home teeth whitening brand* this kit will give you a noticeably whiter smile, 100% guaranteed. Crest 3DWhitestrips Professional Results is designed to whiten like a professional-level teeth whitening treatment at-home using the same enamel safe ingredients that dentists use. The Advanced Seal Technology's comfortable, 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. This enamel-safe, at-home teeth whitening kit will make your teeth 12 levels whiter. Simply apply Crest 3DWhitestrips Professional Results for 30 minutes a day for 20 days. This pack includes 40 teeth whitening strips, 20 for your top teeth and 20 for your bottom teeth, to be used over the course of 20 days.*In a survey of over 500 dentists from Jan 12th-April 2023