Twister with CPO Technology features a patented Twister design that generates a pulse within the airflow. This "heartbeat" of airflow is concentrated into a twisting pattern which lifts the hair to ensure complete drying to the roots. The twisting pattern also increases the surface area to prevent "hot spots"and discomfort. Wrist fatigue is significantly reduced because you no longer have to force the air movement with your wrist. Simply, let the dryer do the work!