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

How to use: 

Use as a complete system with Extreme Length conditioner and leave-in treatment. Apply to wet hair, massage into lather and rinse. Follow with Extreme Length conditioner and leave-in treatment. In case of contact with eyes, rinse them immediately.