Indian healing clays have been used for centuries to beautify and refresh when used as a facial mask. Cleopatra used clay from the Nile River and the Arabian desert over 1800 years ago, as part of her beauty ritual. German and Roman spas have been using clay packs and treatments in the spas they built 4,000 years ago. Many of these spas still exist and use clay even today. Many famous naturopaths, such as Kuhn, Just and Kneipp have contributed to the revival of the uses of clay through their natural treatments for arthritis and skin ailments. Pliny the Elder devoted an entire chapter of his natural history to the many uses of clay for pimples, blackheads and skin tightening. Throughout history, the use of clay, specifically green clay or bentonite, is well documented. Aztec Secret Indian Healing Clay Deep Pore Cleansing Facial & Body Mask is bentonite clay from Death Valley, California, where it is sun-dried for up to six months in temperatures that sometimes reach 134 degrees. Each product is protected by an outer seal complete with custom whole jar shrink-wrap and a non-tear calcium bentonite clay sticker with rounded edges. Each jar comes complete with laser printed lot numbers and expiration dates on the bottom of the jar for your safety and peace of mind.