Olaplex Nº.9 Bond Protector Nourishing Hair Serum is a leave-in, silicone-free hair serum to shield from pollution and heat that cause tangles, breakage, and static. Olaplex Bond Building Technology is paired with potent, antioxidant-rich Red Algae Extract to nourish hair, block pollutants, and neutralize free radicals. See satin shine, style memory, bounceback curls, tangle and static control, and heat protection up to 450°F. For all hair types. Features & Benefits: Satin shine Style memory Bounceback curls Anti-tangle Anti-static Heat protection up to 450°F (232°C global) Made without silicones, sulfates, phthalates, parabens, or gluten. Vegan. Color-safe.