Improved formula. Removes up to 80% of surface stains even in hard to reach places. Enamel safe whitening. Cleans hard to reach areas. Prevents future stains. Satisfaction Guaranteed: Crest 3D white toothpaste will provide you with a whiter smile - guaranteed. If you are not satisfied with your results, crest 3D white toothpaste 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. www.crest.com. www.pg.com.