Roots Theramic Brush eases tedious styling and Blow drying. dont be fooled by its heavy built, this brush combs through hair like the cool evening breeze. Unique design with a firm grip Roots Theramic brush eases tedious heat-styling and blow-drying. Combing through hair like a breeze. With its unique design and firm grip, the Theramic Brush comes in five different sizes making it perfect for all hair lengths.