Kérastase Première Repairing Anti-Frizz Filler Heat Protecting Hair Serum [STEP 4- PROTECT & REPAIR] deeply repairs all levels of damage for all hair types, protecting against further breakage. This includes damage from heat styling, over-processing, colour treatment, bleaching, and even water in your shower. Formulated with a concentration of Peptides, this professional leave-in Serum penetrates hair's inner layer, to help deeply repair and refill hair surface. With its white balmy texture, the leave-in Serum helps seals the cuticles of damaged hair, while filling over external damage to the fibre and protecting against heat up to 230°C. Hair is left glossy and supple. 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 Repairing Anti-Frizz Filler Serum as a final step. The Heat Protecting Serum helps: Provide up to 3x smoother hair* Provide up to 2x softer hair* Provide up to 72H anti-frizz* Protect your hair from heat, up to 230°C* 95% of women agree hair looks radically healthy** *Instrumental test **Consumer perception test, 84 women. STEP 1 – ACTIVATE REPAIR Start by applying the Pre-Shampoo Hair Treatment generously before the shower to damp hair. Leave in for 5 minutes. Do not rinse. STEP 2 – CLEANSE & REPAIR After 5 minutes, layer directly on top with the Deep Repairing Shampoo. Apply and massage, then rinse thoroughly and towel dry hair. STEP 3 – CONDITION & REPAIR Apply the Deep Repairing Conditioner on lengths, massage then rinse. Twice a week, apply the Anti-Breakage Repairing Filler Mask on top of the Conditioner. Massage and twist through lengths. Leave in for 10 minutes. STEP 4 – PROTECT & REPAIR Apply the Repairing Anti-Frizz Filler Serum on lengths of towel-dried hair to protect hair from damage and heat up to 230°C*, blow dry and heat style. Do not rinse. To finish your Première routine, apply 1 or 2 drops of Intensive Shine Repairing Oil to damp or dry hair to nourish lengths and split ends. *Instrumental test. Peptides: A chain of amino acids, known to refill hair surface Glycine: To help deeply repair