It's like a curling iron inside your brush. A medium round brush with a 2.25" vented ceramic barrel that allows for maximum heat and airflow to lock in volume and curl for long-lasting styles. Features and Benefits: Ionic Technology helps reduce frizz and adds shine while styling Bristle design allows for exceptional tension and control Ergonomic, lightweight handle provides greater comfort Soft-touch finish and thumb grip prevent slipping Approx. 2.25'' How to Use: Creates waves in medium to long hair. Adds volume and helps straighten short to medium hair. For loose curls and waves: Use vertically throughout the hair For volume at the roots: Use horizontally at the crown For straightening: Use horizontally throughout the hair