Goldwell Dualsenses Just Smooth Rich 6 Effect Serum instantly delivers 6 effects to nourish, repair and strengthen hair. This extra-rich serum delivers shine and smoothness while taming your locks and increasing manageability. It also protects against humidity and prevents frizz for smooth, healthy-looking hair. Developed using a new innovative microPROtec complex that distributes essential care ingredients quickly and evenly for instant results you can see and feel, this powerful serum will keep your hair smooth and radiant with each use.