Redken Extreme Length Primer Rinse-Off Treatment, 5 Oz

New Extreme Length Primer with biotin builds strength from root to tip and targets split ends. What it does: Extreme Length system of Shampoo, Primer and Sealer helps achieve your maximum hair length - up to 6" in a year. What else you need to know: Formulated with biotin; Provides weightless conditioning; Builds strength from root to tip; Healthy hair can grow 3-6" in a year. Extreme Length system of Shampoo, Primer and Sealer helps achieve your maximum hair length - up to 6" in a year; Exclusive Interlock Protein Network strengthens hair; After using Extreme Shampoo, apply on damp hair from root to ends. Leave on 2-5 minutes