The Sutra IR Straightening Brush 3.0 uses over 60 heated tourmaline bristles and 90 ionic infused grip bristles to straighten and smooth hair with simplicity and ease. Infrared technology is a safe and gentle way to leave hair smooth and shiny without the damaging effects that often accompany heated styling tools. The IR Straightening brush 3.0 rapidly heats up to 450ºF so that nothing stands between you and your flawless, salon-quality style.