HeatFlex™ bristles are heat resistant for blow dry styling. 20% wider surface area* spreads treatments evenly. AquaVent™ design allows for fast drainage and easy cleanup. Minimizes pain and protects against split ends and breakage. Lets you brush with less force so you can detangle with less damage to your hair**. Independent clinical trials show IntelliFlex bristles are less damaging than a traditional styling brush*.