The Wella Professionals Ultimate Repair Overnight Serum allows you to get ahead on your morning styling routine. Suitable for all types of hair damage, the leave-in treatment creates an invisible shield over the lengths while you sleep, helping to protect against tangling, moisture loss and snapping. The serum is blended with omega-9 for a hit of hydration. Offering both instant and long-term results, the formula leaves hair visibly brighter and up to six times smoother* after one use. After a week, users may see up to 78% less hair breakage* and 86% less split ends,* alongside a reduction in pillow-induced breakage.** *Vs. non-conditioning shampoo. **Due to less tangled hair in the morning that is combed easier, vs untreated.