T3 professional-grade brushes are ideal for polishing hair, adding volume, keeping styles fresh and static-free. Each unique brush packs a plethora of negative ion-releasing Tourmaline particles. The Tourmaline-infused ceramic barrel retains heat during styling with T3 hair dryer. Large 3" round barrel is ideal for smoothing hair and adding large curls or waves, especially for long hair. Tourmaline ionic Bristling.