The more you know about the effects of warm or hot air over your hair, the easier it becomes to choose the right hair dryer. For example, the hot air influx can turn curly or wavy hair into rigid and frizzy hair. In order to maintain the natural beauty of your hair, opt for a hair dryer with low speeds. You an also come up with a speed combination of low and medium levels. A diffuser will also help in maintaining wavy hair in the best possible shape. Luckily, diffusers have become quite common these days. Even if your hair dryer does not have one, you can probably find it as an attachment. Check some hair dryer reviews as well.