Product Features It is a nourishing hair serum that protects hair from damage caused by environmental factors and provides protection against heat. It features Olaplex's skate bond strengthening technology. Provides heat protection up to 232 degrees. It creates a shield for hair against air pollution for 48 hours. It neutralizes free radicals, clears tangles in the hair and gives shine and softness. It is rich in antioxidants. Thanks to "Style memory", it makes hair styling easier and longer-lasting. It strengthens broken and damaged bonds in the hair. It is silicone-free. It does not contain paraben and sulfate. It is vegan. The safety and performance of Olaplex products have been extensively tested by independent third-party laboratories – in accordance with in-group industry standards. How to Use: Apply a small amount of the product to damp hair from ends to roots. Dry naturally or with a hair dryer. You can apply a small amount to dry hair to control frizz.