Kérastase Première Intensive Shine Repairing Hair Oil [STEP 4- SHINE & REPAIR] deeply repairs and intensily protects shine on all levels of damage for all hair types. This includes damage from heat styling, over-processing, colour treatment, bleaching, and even water in your shower. This pro-level shine intensifying Hair Oil dives deep to repair hair from the inside out, leaving hair stronger. The transparent, enveloping Hair Oil helps seal the appearance of split ends, boosts hair strength, and radically neutralizes the persistent dullness of damaged hair. Think of it like a skincare routine for your hair. Apply the Pre-Shampoo Treatment generously before the shower to damp hair, then after 5 minutes, layer the Shampoo directly on top and lather. Rinse and finish with the Repairing Conditioner, and seal the deal with Première Intensive Shine Repairing Hair Oil as a final step. The Shine Repairing Hair Oil helps: Provide up to 92% fewer visible split ends* Provide up to 4x shinier hair* 95% of women agree hair looks radically healthy** *Instrumental test **Consumer perception test, 84 women.