Ionic hair dryers have increased in popularity for several years. They are becoming favored over traditional ones because they keep hair healthier. Ionic dryers work by sending negative to positive ions in wet hair. When combing these two types of ions, water is broken down faster, and moisture is sealed in the cuticles of each strand of hair. There are several different types of ionic hair dryers available. Some have metal, ceramic or tourmaline coils, yet still emit negative ions to the hair. Tourmaline is comprised of crushed gems and these dryers are generally the most expensive ones, because tourmaline produces the highest number of negatively charged ions. Generally spoken, using an ionic dryer results in less frizziness and an increase in shine to the hair. This type of hair dryer is ideal for straight and smooth styles. Here you can find some of the most recommendable models.