This is a premium modeling mask that is made by using the principle that Alginate extracted from seaweeds reacts with diatomaceous earth & becomes as hardened as rubber while it gelates. While you are being packed it creates a vacuum by blocking completely the air between the skin & the mask thus preventing the active ingredients in the pack from being evaporated outward & simultaneously having the same ingredients absorbed more deeply into the skin. It also helps remove various kinds of waste & dead skin cell that cannot be removed even by cleansing when you tear the mask off.