Want to transform your smile in just 1 week? Try Crest 3DWhitestrips 1 Week Smile Transformation. This at-home teeth whitening treatment will make your smile 8 levels whiter in 7 days with a comfortable, no-slip teeth whitening experience. This teeth whitening kit includes two 1-week kits so you can keep your smile radiant. We recommend using a 1-week treatment every 6 months. It's accepted by the American Dental Association for safety and effectiveness and uses the same enamel-safe whitening ingredient as dentists. 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 3DWhitestrips 1 Week Smile Transformation from the #1 dentist-recommended at-home teeth whitening brand and get noticeably whiter teeth, 100% guaranteed. Simply apply Crest 3DWhitestrips 1 Week Smile Transformation for 60 minutes a day for 7 days. This pack includes two 1-week kits with 28 teeth whitening strips, 14 for your top teeth and 14 for your bottom teeth.