WHAT IT IS WHAT IT DOES HOW TO USE IT CLAIMS ANIMAL TESTING BACK TO MAC. MAC accepts returns of its primary packaging through the Back-to-MAC Program. By returning six [6] MAC primary packaging containers to a MAC counter, you’ll receive a free M·A·C lipstick of your choice as a thanks to you. Note, Lipsticks provided at no charge cannot be returned or exchanged. Back-to-MAC is only available in stores. Style Code: 0400086887277