Matrix Biology thermal active setting spray helps you style with confidence! Confidence that your hair will be protected from those damaging heat-styling tools. Confidence that no matter how fine your hair may be it will have added volume. Confident in the long-lasting control. So spray on style and go! Hold up that gorgeous head of hair of yours and have a confident day! Protects hair against thermal damage. Adds body and volume. Makes hair more manageable when styling.