What makes the Muk Blow 3900IR so special? Well, it cares about hair as it styles it. Hair is dried gently and quickly, infusing it with shine, moisture, and protection. With innovative infrared lights embedded in the dryer's barrel, heat is dispersed gently deep inside the hair shaft. This technology provides a smooth, targeted heat that prevents frizz and static. The ionic generator produces millions of negative ions to infuse hair with shine and protection.