Phillips 3-D Hot Heads High Performance Hair Brushes - Medium 2 1\/4in Focused air technology channels air directly to the bristles for reduced drying timeThree dimensional bristle pattern that improves control, engages the hair, and shines and polishes the hair with each stroke3 Types of Bristles: White Boar, Black Boar, & Nylon Ball TipTruly a leap forward in performance for the professional stylist Phillips 3-D Hot Heads High Performance Hair Brushes - Medium 2 1\/4in