iS Clinical Hydra-Cool Serum (1 oz.). Bought 2 weeks ago and only used a couple times. A multi-use formula to restore hydration and provide excellent antioxidant protection. Hydra-Cool Serum contains the powerful, healing antioxidant centella asiatica with vitamin B5, hyaluronic acid, kojic acid and soothing menthol. It works to hydrate and nourish the skin while providing intense protection through antioxidants. Ideal for all ages and all skin types, including sensitive, just-sunburned skin.