Significantly Reduce Breakage And Repair Damage At The Source With This High-Powered Restorative Serum. Boosted With Clean, Clinically-Proven Vegan Silk And Biomimetic Bond-Building Technology To Reduce Breakage And Increase Strength From The Inside Out. A Highly-Concentrated, Silicone-Free Serum That Provides 11x Softer* Strands, With 88% Split End Sealing And 450°F Degree Heat Protection.