Wella System Professional Sensitive Mask is a soothing & relaxing treatment for sensitive scalps that provides long-lasting moisture to calm even the most irritated scalps. It has an active complex to help build up the skins natural defence barrier allowing your skin to regain its ability to protect itself against further irritation. To use: Apply directly to the scalp section by section after cleansing. Massage gently & leave for 5-10 minutes before rinsing thoroughly.