The Joico Defy Damage SleepOver Overnight Treatment is designed to work while you rest, deeply nourishing your hair for revitalized results by morning. This treatment targets damage and dryness, helping to restore hair health and manageability. Apply before bedtime to clean, dry, or towel-dried hair. No rinsing is required in the morning. Wake up to smoother, more resilient hair, ready to face the day without frizz or dullness.