Redken's Extreme Length Leave-In Treatment with biotin strengthens damaged hair and helps hair to grow longer and stronger. Extreme Length Leave-In Treatment helps prevent breakage to promote your strongest, healthiest hair. 

• Reduces breakage by 81% when used as a full system with Redken Extreme Length Shampoo and Extreme Length Conditioner

• Visibly reduces the appearance of split ends by 78%

• Formulated with biotin and soy protein to help strengthen hair

• Adds manageability, smoothness and shine.

How to use

Apply to clean, damp, towel-dried hair. Leave-in. Style as desired. Use as a complete system with Extreme Length Shampoo and Extreme Length Conditioner with Biotin.