Crest 3D Whitestrips Sensitive 28SCrest 3D Whitestrips Sensitive 28s Crest 3D Whitestrips Sensitive 28s is an at home teeth whitening kit specially designed for people with sensitive teeth and gums, helping you achieve a brighter smile while keeping comfort in mind. Each strip uses a gentle whitening formula with hydrogen peroxide, which works to lift and remove deep stains from coffee, tea, smoking, and everyday food. The sensitive version is carefully formulated to reduce discomfort