The tresemme ceramic heat retainer large brush is designed to give your hair body and volume for a fuller thicker looking style it can be used for straightening medium to long hair during blow drying the ceramic rods allow better airflow and retain heat for longer reducing drying time and the flexible bristles gently hold the hair in place providing optimum control all tresemme hair brushes feature a nano silver coating a natural antibacterial and also an easy grip soft touch handle for co