TRESemmé Biotin Repair Leave-In Cream Serum for stronger, smoother, and frizz-free hair. This salon-inspired hair treatment is formulated with Biotin & Pro-Bond Plex to help repair hair bonds and protect against external damage. It reduces breakage by up to 98% and makes hair up to 3x stronger with continuous use. The serum hydrates hair, leaving it soft and smooth, while protecting against UV radiation. Suitable for adult women, this leave-in treatment is ideal for creating the perfect canvas for any hairstyle. Apply evenly to washed, damp hair and style as usual. Experience the power of style with TRESemmé.