5 In1 Professional Hair Dryer Brush Automatic Curling Iron Hair Straightener Comb Hair Styling Tools Blow Dryer - Multi-colours. DRYEROur hot air hair straightener uses advanced negative ion technology and ceramic coating to prevent frizz and static. Thanks to the combination of nylon pin and tufted bristles, our hair dryer brush minimizes tangling and breakage along with helping provide comfortable scalp massages.