Absolut Repair Molecular Leave-In Mask 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 fibre, making damage almost irreversible.- Rebuild hairu0027s molecular structure*- Up to 97% more hair strength**- Heat protection up to 230C/450F***For the first time, LOral Advanced Research achieved to decompose peptides, to inject their components separately into the fibre****. Once inside, they reform u0026 rebuild the molecular structure of the hair*.To use: Apply on towel-dried hair. Divide hair into two sections and apply one pump per section. Apply more if necessary. Detangle for optimal distribution. Leave in, and proceed to blow-dry.For optimal results, use after Absolut Repair Molecular shampoo u0026 rinse-off serum.*Instrumental test after 15 applications of Absolut Repair Molecular Shampoo + Rinse-Off Serum + Leave-In Mask**Brushing Test vs sensitised hair ***Instrumental test on Leave-In Mask****Amino Acids + Peptides bonder