Product Information This hair dryer features a high-performance filter and emits negative ions. The negative ions neutralize positive ions, reducing cuticle damage. The high-performance filter reduces the entry of hair, dust, and other debris into the heater compared to conventional models. The filter can be cleaned with a brush or water and is tear-resistant. It features a smooth, curved grip that fits comfortably in the hand. The instant cool switch allows for easy cool shots to finish styling.