It's like a curling iron inside your brush. A large round brush with a 2.75" 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 reduces frizz and adds tons of 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. 2.75" 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.