THE KNOT DR. FOR CONAIR: This vented medium round hair brush features boar and nylon Flexalite bristles that smooth your hair and add shine as you blow-dry for gentle, professional blowouts at home. After years of research and development, the Knot Dr. is ready to operate—now with a vented heat-resistant design that funnels airflow directly to your hair to accelerate blow-drying and add volume and lift.