This night serum from Kérastase is a light leave-in formula suitable for all types of blonde hair. Serum enriched with Hyaluronic Acid and precious Edelweiss, works overnight and reduces 55% of damage from bleaching, for 74% more hydrated and 80% stronger hair*. The creme-gel texture of the serum acts protectively against friction from the pillow, split ends and hair that has a tendency to fall off. Cares for the hair so that it looks beautiful the morning after. Apply to lengths and ends in the evening. The serum has a light consistency that is absorbed immediately. Wake up with softer and stronger blonde hair. *Instrumental test.