The Olaplex #9 Bond Protector Nourishing Hair Serum is the perfect way to add a boost of nourishment and protection to your hair. It acts as an anti-damage hair shield that helps prevent breakage and split ends. It includes the brand's patented bond-building technology, which repairs and rebuilds damaged hair. This luxurious serum is formulated to provide an intense boost of hydration, leaving your hair with a satin shine and softness. This serum is a must-have for hair that looks healthy, strong, and beautiful.