Seeing Dull Hair, Tangles, Or Poor Style Retention? These Could Be Signs Of Pollution Or Heat Damage. Protect Your Hair From Daily Damage With This Weightless, Leave-In, Silicone-Free Hair Serum To Shield Hair From Pollution For 48 Hours And Provide Heat Protection Up To 450°F (232°C). With Antioxidant-Rich Red Algae Extract And Scientifically Proven Olaplex® Bond Building Technology™.