Absolut Repair Molecular Leave InDeep molecular repairing leave in mask for damaged hair. Repairs & protects hair. Heat protection up to 230C*. When hair is damaged, its molecular structure, composed of peptides, is compromised. Hair breaks, becomes too elastic, with no movement. But most peptides are too big to be reinjected into the fiber, making damage almost irreversible. For the first time, LOral Advanced Research achieved to decompose peptides, to inject their components