This is your 7th grade dream come true—a straightener that literally predicts exactly what temperature each individual section of your hair needs. If only we had this back in the day when straighteners weighed 200 pounds and had one heat setting, right?! Through its predictive technology, the ghd Platinum flat iron recognizes the thickness of your hair and the speed at which you are styling, and then magically the power accordingly. It’s incredible and, more than all that, it has an automatic “sleeper” mode so if you leave it on by accident, it switches off after 30 minutes of non-usage.