The Obagi Clenziderm Therapeutic Moisturizer is step three in the three-step Obagi Clenziderm M.D. system for normal to dry skin. This product moisturizes chapped, uncomfortable skin caused by environmental factors as well as from the drying caused by acne treatment. It provides protection from the cold and the wind, helping keep the skin from becoming cracked and dry. This gentle formula calms and soothes the skin by diminishing irritations caused by the weather, pollutants, acne and makeup. The skin is left protected, moisturized, soft and comfortable.