Crest 3D White Whitestrips Whitening Kit, Dental, Stain Shield

28 pouches: Each with 1 upper and 1 lower strip (56 total strips). 5 minute touch-ups. Removes tough stains from coffee, wine, smoking, etc. Protects from build-up of future stains. Once a day. 4 week supply. Enamel safe. Stain Shield Whitestrips: enamel safe; removes surface stains; same whitening ingredient that dentists use; whitens below the surface where stains get trapped; helps prevent the build-up of future stains; noticeably whiter teeth with continued use. Ordinary Toothpaste: enamel safe; removes surface stains.