What it is: A reparative overnight treatment engineered to seal hair cuticles that have been damaged through chemical processes or physical stress.Who it's for: Ideal for those with damaged hair.What it does: It helps to repair and replenish damaged hair, increase shine and restore moisture while you sleep. Bond-enforcing molecules fill cracks and fissures in the cuticle, locking the cuticle down, smoothing the hair fiber and decreasing friction. It absorbs instantly and won't leave residue on pillows or sheets.Research results: Based on a study vs. untreated hair, it helps reduce breakage by up to 99%. How to use: Apply to dry hair before bedtime. Leave on overnight and shampoo out the next morning. For best results, use 2-3 times per week. 3.4 oz. Made in the USA