8H Magic Night Serum by Krastase is a beauty sleep high-nutrition serum for dry hair. This overnight hair treatment contains anti-dryness polymers for immediate care with a light and non-greasy finish. It also delivers a dose of essential nutrients that boost the formulas ability to nourish and reinforce the hair. The magical overnight hair serum works for 8 hours to revitalize and regenerate dry hair and protects it from pillow friction. +98% stronger hair* Bottle made of 20% recycled glass. *Instrumental test results after application of 8H Magic Night Serum.