Keep your curls in line! Our diffuser broadens and reduces the speed of the airflow from your blow-dryer to gently dry, define curls, and reduce frizz in naturally curly hair. This diffuser broadens and reduces the speed of the airflow from your blow-dryer to gently dry, define curls, and reduce frizz in naturally curly hair. Attach to the nozzle of your blow-dryer and adjust the temperature setting to low or medium. Start at the ends. Gently scoop large amounts of hair into the diffuser, allowing the natural curls to form. Work slowly up to the root, gently massaging your hair in a circular motion with the diffuser's "fingers." Hold each section in place for several seconds before moving on to the next section. Continue until the hair is dry. TIP: Tilt your head so you can "dip" your hair into the diffuser.