The minerals have been lab tested and found non hazardous and non harmful. These are natural minerals, with unique properties to allow to be reused over and over. The minerals are natural minerals and environmentally safe. No additives or harmful process used in the making of these products. The Bureau VERITAS Products Services Inc. completed testing of our product and has given our products Certificate of Compliance. And Non Hazardous Nor Harmful. (Discovery Channel Stores Eye Mask) All of our products use same ingredients as our self cooling eye mask.