If you have teeth that are sensitive to teeth whitening but still want to achieve a whiter, brighter smile, try Crest 3D White Gentle Routine White strips. Using enamel-safe treatments, Gentle Routine gradually whitens beneath the surface of the enamel, and are easy on your teeth. Crest 3D White Gentle Routine Whitestrips: Are specially formulated for teeth that are sensitive to teeth whitening products Gently remove years of stains for a whiter smile Provide a comfortable at-home teeth whitening experience Use the same enamel-safe whitening agent that dentists use Advanced Seal™ Technology’s no slip grip stays put. No slipping, no sliding! Whitestrips are so easy to use: you can whiten while you walk, talk, work, even drink water The strips mold to the shape of your teeth and come off cleanly Usage: Use 30 minutes daily for gradual whitening. Full results in 14 days.