K18 Molecular Repair Mask is a repairing leave-in hair mask that transforms even extremely damaged hair into resilient and healthy hair. The damage can be caused by bleaching, perming, hair dyeing, other chemical treatment or heat styling. K18 Molecular Repair Mask contains a groundbreaking molecule, namely K18Peptide. This patented peptide repairs the hair from the inside out by rebuilding damaged hair and preventing future damage, frizz and split ends. In addition, it is clinically proven that the formula recovers 91% of the hair's own strength and 94% of the hair's elasticity. K18 Molecular Repair Mask consists of a delicious, light texture that feels weightless in the hair, without appearing heavy or greasy. Simply let the hair mask work for four mint teats in freshly washed, towel-dried hair, and say hello to a nourished and super soft result. Recreate smooth, strong and healthy hair with this professional hair care product that will become an indispensable product in your hair care routine! NOTE: As this is a leave-in product, it should NOT be rinsed out of the hair. Therefore, do not use conditioner in conjunction with this product.