jane iredale D2O Hydration Spray utilizes a hydrogen molecule that is twice the weight of the molecule in ordinary water, which makes D2O 10% heavier than H2O. It can be used to set mineral after makeup has been applied or hydrate skin, especially in dry climates. People with oily skin can use it as a moisturizer. The skin becomes extremely hydrated, supple and fresh. D2O is also ideal for laser patients, particularly during dry, flaky periods. Due to a manufacturer packaging change, item received may vary from product image. | jane iredale D2O Hydration Spray Moisturizer, 3. 04 fl. oz | Dermstore