The TRESemmé Bond Repair Hair Serum (often labeled as Peptidebond+ No. 4 Hair Serum) in the 100ML size is a leave-in treatment designed to repair and protect damaged hair.1Here are the key details about the product:Product Name: TRESemmé Bond Repair Peptidebond+ No. 4 Hair Serum (or similar variations like Keratin Repair Bond Plex Oil Hair Serum).Size: 100ML.2Core Technology: Infused with advanced Peptidebond+ Technology (or similar Bonding Complex/Bond Plex technology).3Primary Benefit: It is formulated to repair and strengthen broken hair bonds—the internal structures of the hair that are damaged by heat styling, chemical treatments (like coloring or bleaching), and other environmental aggressors.4Key Features and Benefits:Bond Strengthening: Penetrates deep into the hair fiber (sometimes stated as up to 10 layers) to rebuild and reinforce the hair's structure.5Damage Repair: Visibly repairs and restores resilience to brittle, damaged, or chemically processed hair.6Heat Protection: Provides protection against damage from heat styling tools (often up to 7$220^\circ C$ or 8$230^\circ C$).9