Pantene Pro-V Infinite Lengths Leave-In Daily Strengthening Hair Spray is a biotin hair spray that instantly strengthens dry and damaged hair and provides protection against environmental factors. Enriched with Niacinamide, this hair spray strengthens long damaged hair without weighing it down, making it up to 8 times stronger (power against damage caused by styling – compared to using Pantene Purifying shampoo alone). Combine with other Pantene Pro-V Infinite Lengths hair products for a complete hair care routine.