Promoting smoothness for up to 48 hours, Sebastian Professional's Dark Oil Smooth and Shine Styling Oil envelops lengths in moisture without any added weight. Making the perfect styling companion, the hair oil smooths the appearance of flyaways to encourage sleeker-looking strands. Its nourishing formula helps to detangle the look of hard-to-comb knots with a more manageable feeling. Lightweight but powerful, the botanical blend melts onto the hair with an untraceable finish.