Absolut repair molecular mask leave-in when hair is damaged, its molecular structure, composed of peptides, is compromised. Most peptides are too large to be reinjected into the hair fiber, making the damage almost irreversible. Deep molecular repair leave-in mask: repairs and protects all types of damaged hair without adding a rinsing step thermal protection up to 230°c: helps protect the fiber during drying and the use of heat tools patented technology: formulated with bond repair and 5 amino acids to act on the macromolecular structure of the hair for damaged hair: suitable for natural, dyed or bleached textures and designed as the last step in the absolut repair molecular routine scientific discovery - absolut repair molecular: repairs 2 years of damage in just one use*. L'oréal's advanced research has broken down peptides, allowing their components to be injected separately into the hair fiber**. Once inside, these components reform and rebuild the hair's macromolecular structure. Instructions for use: for optimal results: use after absolut repair molecular shampoo and rinse-off serum. Apply to towel-dried hair. Divide the hair into 2 sections and apply pressure to each section, adding more if necessary. Untangle for optimal distribution. Let it happen. Dry with a hairdryer or air dry. Benefits: repairs the macromolecular structure of the hair* instant penetration for a natural feel soft, shiny, and healthy-looking hair heat protection up to 230°c patented technology: this patented leave-in mask, formulated with a bond repairer and 5 amino acids, repairs the hair's macromolecular structure*. The result is stronger hair with greater elasticity and movement****. Professional formula: lightweight texture that penetrates instantly, restoring hair's original strength*** instant transformation: soft, shiny hair protected from external aggressors heat protection: protects hair up to 230°c, keeping it healthy and shiny. Transform your hair with absolut repair molecular and enjoy a deep and lasting repair.