Goldwell Dualsenses Green True Color Sulphate-Free Shampoo 250ml Designed for colour treated hair, this Green True Color Sulphate-Free Shampoo from the Goldwell Dualsenses range boasts a sulphate free formula full of natural ingredients that gently cleanse the hair & leave it silky smooth. Directions of use: Apply Dualsenses Green True Color Sulphate-Free Shampoo to wet hair, lather & rinse.