Redken Hair Treatment Mask, For Longer, Stronger Hair, Extreme Length, 250 ml. Support healthy hair growth by targeting it at its breaking point with Extreme Length Triple Action Treatment. Enriched with Niacinamide, Castor Oil, and Biotin, this 5-minute professional rinse-out treatment for fragile hair helps to promote a nourished scalp, strengthen the lengths, and visibly reduce the appearance of split ends. Protect your length and get stronger hair* with this must-have treatment. *On average hair can grow up to 6 inches in a year/ System vs non conditioning shampoo