8 Strips: 4 treatments (Each with 1 upper/1 lower). Removes years of stains in just one hour. Enamel safe. Anti-theft program. Removes years of stains in just 1 hour. Advanced seal technology provides a strong grip that molds and adheres to your smile for a comfortable, no slip whitening experience. Enamel Safe: All Crest 3D White Whitestrips use the same enamel safe whitening ingredient as the dentist. Satisfaction Guaranteed: Crest 3D White Whitestrips provide you with a beautiful, whiter smile - guaranteed. If you are not satisfied with your results, Crest will send you a pre-paid card in the amount of your purchase. Simply return your receipt and package UPC within 60 days of purchase. Limit to one refund per person. Call 1-800-208-0169 for more information. To learn more about Crest 3D White or get special offers, go to 3DWhite.com. Questions: Call 1-800-395-8423 or visit www.3DWhite.com. www.pg.com.