Goldwell Dualsenses Just Smooth 60 Sec Treatment is a treatment specifically developed to make unruly hair more manageable. This mask combats frizz and detangle the hair, making it also easier to comb. Goldwell Dualsenses Just Smooth 60 Sec. Treatment makes hair smoother and softer and ensures a beautiful shine. The mask is enriched with kukui nut oil and active ingredients for the hydration of the hair.