An oil serum for perfectly smooth and protected hair during styling | Let your dry, stressed hair shine again. The nourishing oil serum Wella Professionals Ultimate Smooth Oil Restores their lost beauty in just 30 seconds. It nourishes them deeply, gives them una silky softness, una It delivers dazzling shine and combats frizz. Plus, thanks to its sun protection and heat protection up to 230°C, your hair will stay protected during styling and all day long.