The Thermoactive Round Vent Brush is designed to speed up blow-drying while delivering smoother, shinier results. Its vented structure allows air from the dryer to flow through the brush for faster drying. The combination of ionic and boar bristles helps smooth the hair cuticle, reduce frizz, and enhance natural shine. Vented design speeds up blow-drying Helps reduce frizz and static Enhances softness and natural shine HOW TO USE Use on damp hair while blow-drying. Wrap sections around the brush and direct airflow through the brush to smooth the lengths, add volume, or create movement.