What it is: A high-powered restorative serum that significantly reduces breakages and repairs damage at the source.What it does: The serum is boosted with clean, clinically-proven vegan silk and Biomimetic Bond-Building Technology to reduce breakage and increase strength from the inside out. The highly-concentrated, silicone-free serum softens strands, seals split ends and provides heat protection. 1.7 oz. Made in the USA