Used only once. Selling to get the Air Wrap instead. Dyson Supersonic™ hair dryer The Dyson Supersonic™ hair dryer is engineered to protect hair from heat damage, with fast drying and controlled styling to help increase smoothness by 75%, increase shine by up to 132% and decrease frizz and flyaways by up to 61%.³ Air Multipliers™ technology to produce a high-pressure jet of controlled air, for fast drying and precision styling.