Transform lack-lustre locks with the Extreme Length Primer Treatment Duo from Redken. Specially formulated with the brand's unique Interlock Protein Network to effectively prevent split ends & reduce breakage & biotin to strengthen hair from root to tip & deeply condition locks. The rinse-off treatment targets distressed hair & promotes growth to help you achieve healthy-looking, voluminous locks. The handy pump bottle makes application easier & reduces spillage.