Smoothing heat protectant serum for frizzy hair Hydrating smoothing serum for thick and coarse frizzy hair. This lightweight leave-on serum gives long-lasting frizz protection with light control and locks in moisture for hair soft, shiny, and visibly smoother. Perfect for taming flyaways and managing unruly strands for a polished and manageable feel. With certified regenerative apple pulp extract, it is rich in carbohydrates that lock in moisture. Provides heat protection up to 230°C (446°F), makes hair 2 times smoother, and frizz-free for up to 72 hours.*