Pantene's Pro-V Infinite Lengths Daily Strengthening Mist Leave-in is a biotin hair spray that provides instant strength boost to dry & damaged hair and defend against environmental aggressors. Enriched with niacinamide, this hair spray strengthens your long damaged hair to make it up to 8X stronger (strength against styling damage vs. using Pantene Clarifying shampoo only) with no weight down. Use together with other Pantene Pro-V Infinite Lengths hair products for a complete hair care routine.