Skin-Hydrating BoosterPlease note that all cosmetics items are final sale and cannot be returned or exchanged. Boosts skin hydration with Skin Hydrating Booster, a must have booster that penetrates the keratinous layer of skin. Effective Emulsion containing skin softening oleic acid oil agents, which delivers moisture and beauty ingredients deeply into the skin. The booster helps to increase the benefit of any product used afterward. Contains penetrative hyaluronic acid,