The Kérastase Nutritive, Rich Deep Nutrition Hair Mask is a game-changer for fine to medium-thick hair, especially for those dealing with very dry strands. This nourishing and hydrating treatment boasts an impressive Niacinamide formula, making it perfect for all hair types, even those experiencing hormonal imbalances or sensitivity issues. With Masquintense Riche technology, it effectively penetrates deep into the hair shaft, locking in moisture and nourishment to combat dryness and strengthen the hair's bonds. Use this luxurious mask as a weekly routine to revitalize and balance your locks, leaving you with voluminous, lustrous, and healthy-looking hair.