Olivia Garden Ceramic + Ion Thermal Brush 3 1/4 - Ceramic Coated Barrel, Maximixes Heat, Restores Hair Balance, Adds Luster & Sheen, Comfort Grip Ergonomic Handle, *Lifetime Warranty , This 100% natural boar bristle thermal brush features a vented ceramic barrel for faster and more consistent styling. This unique brush also includes an ion charged material designed to help smooth and shine hair.