Kérastase Nutritive Deep Nutrition Ultra-Concentrated Soft Mask is your go-to solution for transforming very dry hair fine to medium hair. Enriched with Niacinamide, this intensely hydrating hair mask restores essential moisture while strengthening the hair’s protective barrier for long-lasting nutrition. This mask replenishes your hair without weighing it down, leaving your hair noticeably softer, smoother and more radiant.