Crest 3DWhitestrips, the #1 dentist-recommended at-home teeth whitening brand. Get a brighter, whiter smile in just 10 days with Crest 3DWhitestrips Noticeably White. This 30-minute teeth whitening treatment makes it easy to whiten teeth without leaving the house. Using the same enamel-safe whitening ingredient dentists use, you can get noticeably whiter teeth, 100% guaranteed. Plus our comfortable, no-slip grip technology helps the whitening strips stay put, so you can talk and drink water while whitening your teeth. Simply apply Crest 3DWhitestrips Noticeably White for 30 minutes for 10 days. This pack includes 20 teeth whitening strips, 10 for yourtop teeth and 10 for your bottom teeth, to be used over the course of 10 days.