The René Furterer Absolue Kératine Ultimate Repair Mask intensely repairs damaged, brittle and highly sensitized hair, from fine to normal. Infused with vegetable keratin, this care with a melting cream texture regenerates hair weakened by chemical and thermal treatments (colouring, bleaching, chemical straightening, brushing...). - Detangles without weighing it down. - Sheathe the hair. - Reinforces the fiber and gives it softness. Delicious fragrance with fruity, floral and oriental notes. How to use On previously washed hair, apply a small amount of care to the lengths and ends. Leave on for 3 to 5 minutes and then rinse. For extremely damaged hair, leave on for 5 to 10 minutes.