Goldwell Dualsenses Men Activating Scalp Tonic 150ml Suitable for all hair types. Refresh and revitalise your scalp with the Goldwell Dualsenses Men's Activating Scalp Tonic, an ultra-fine and lightweight formula that is quickly absorbed and deposits essential hydration to the scalp. A unique complex containing Guarana and Caffeine works to stimulate the root to encourage growth at all times. This helps with resilience of each strand, providing the appearance of healthier looking and stronger feeling hair.