PUREOLOGY是美国美发护发品牌，2001年创办于美国加利福尼亚。下面是官方网站介绍：

We are so sure that you will find Pureology to be the most advanced formula to safeguard your hair colour, that we offer consumers a money-back guarantee. If within 4 weeks of the date of purchase you have been exclusively using a Pureology product and you are not satisfied with the performance or the colour retaining results, please follow the instructions below and we will provide you with a full refund:

1. Send via ground shipment and postmarked within 4 weeks from date of purchase, the unused portion in its original package along with the original receipts with your purchase price and authorized salon/spa information circled to:

Pureology Consumer Affairs
PO Box 2007
Westfield, NJ 07091-2007

2. To ensure a full refund, you MUST have purchased the product from an authorized salon/spa. We strive for 100% customer satisfaction. Please indicate the reason why you are returning the product on the back of your official salon receipt. Pureology can only guarantee the performance of our products when purchased through an authorized salon/spa. If you have purchased any of our products from the following, we can not guarantee that the products are within our standards and therefore will not be able to provide you with a refund.