The Sebastian Professional Penetraiit Overnight Repairing Serum is a 95 ml hair treatment formulated with hyaluronic acid and niacinamide to deeply penetrate and support hair regeneration during sleep. This serum works overnight to rejuvenate the hair cuticle from the inside out, aiming to leave the hair refreshed and ready for styling. It is designed for unisex use by adults and focuses on improving hair structure and resilience. The convenient 95 ml bottle corresponds to 3.2 ounces, making it suitable for regular evening use. Key ingredients include hyaluronic acid for moisture retention and niacinamide for strengthening hair structure, contributing to a smoother and more manageable appearance. Ideal for individuals looking to address hair damage from environmental factors or styling, it emphasizes gradual improvements without harsh chemicals. Application is simple: apply a small amount to damp or dry hair before bedtime, focusing on the ends and damaged areas, and rinse out in the morning if needed. The serum is lightweight and non-greasy, allowing for comfortable overnight use without residue. Made by Sebastian, it meets professional hair care standards with a focus on quality and reliability. Store in a cool, dry place away from direct sunlight to maintain effectiveness. This product supports a consistent hair care routine for improved texture and vitality over time.