12 Whitening Treatments: Each with 1 upper and 1 lower strip. Removes tough coffee, wine and smoking stains. Satisfaction guaranteed. Enamel-safe. Visibly whitens your teeth. Enamel Safe: All Crest 3D White Whitestrips use the same enamel safe whitening ingredient as the dentist. Satisfaction Guaranteed: Crest 3D White Whitestrips provides you with a beautiful, whiter smile - guaranteed.