Now this is a great question. Given the use of straightening irons in use today there is a lot of confusion over what is best for the hair. Nano Titanium emits negative ions in their most beneficial form styling. It is said to lock in hairs own natural moisture. It also produces far infra red heat penetrating the hair from within for gentle straightening. Tourmaline is a Precious stone, whose colours include blue, green, pink, red, yellow, brown, black, bi coloured, tri coloured and colourless. The technical bit! Tourmaline generates negative ions and far infrared rays know as FIR. The FIR helps to lock in natural moisture in your hair and helps remove static which can cause your hair to FRIZZ. Due to the amount of negative irons this produces your straightening time is reduced and your hair is left feeling softer and shinier.