The Goldwell Dualsenses Men Activating Scalp Tonic is a refreshing leave-in treatment that stimulates and revitalizes the scalp while strengthening hair. Suitable for all hair types. Stimulating effect: provides a refreshing sensation and instant cooling effect on the scalp. Key ingredients: contains guarana and caffeine (Recharge Complex) to energize roots and increase hair strength. Technology: uses Instant Microfluid technology for ultra-fine and rapid active distribution. HOW TO USE Distribute evenly on towel-dried scalp. Massage gently. Do not rinse.