Fight cold and flu season before it even starts with this ultrasonic humidifier from Perfect AireⓇ. Our exclusive Micro MistⓇ technology helps disperse a visible, cool mist of tiny water particles that fill the air to help fight airborne illnesses, prevent dry skin and soothe minor cold and flu symptoms like a dry, scratchy throat. Another healthy feature? The 0.4 gallon antimicrobial tank keeps even more germs at bay. Like white noise, it hums along quietly for a good, sound sleep.