If you're using the BaByliss ST495E, you don't have to worry about damaging your hair with the heat of the hair straightener, since this model uses steam to straighten. The steam hydrates your hair when you're straightening it, and makes sure your hair cuticles close. On top of that, the plates of the straightener are fully ceramic and equipped with ionic technology, which results in beautiful, shiny hair. You can choose from 5 temperature settings, ranging from 150 to 230 degrees. If you have thick hair, you should opt for a high temperature, whereas you should choose the lowest setting if you have thin hair. You can use this hair straightener to both straighten and curl your hair: since the metal casing becomes hot, it's very easy to make curls in your hair.