CHI Air Tourmaline Ceramic Nylon Round Brushes utilizes Tourmaline Ceramic, the latest innovative technology to produce an exceptionally high amount of negative ions and Far Infrared, which reduce static electricity. These brushes allow for maximum airflow, reducing drying time by 50% and leaving hair smooth and silky with an unparalleled shine. Features Ion Infused Nylon Bristles Ball Tip won’t Snag or Pull Hair Reduces Static Electricity Reduces Drying Time Leaves Hair Smooth and Silky Unparalleled Shine Available sizes: Small (1 Inch) Medium (1 1/2 Inch) Large (2 Inch)