Redken Extreme Length 

You love Extreme for making your hair stronger* and feeling nourished, and now you’ll love it for helping to protect the look of lengths too! New Extreme Length Primer and Sealer are enriched with biotin. These products make your hair feel stronger** and helps reduce the appearance of split ends build strength from root to tip and target split ends. Extreme Length system of Shampoo, Primer and Sealer helps prevent your hair from reaching breaking point by reducing breakage**, thus maintaining its full potential for dream lengths.