Designed to be easy to use and compact our Vicks Ultrasonic Filter Free 1 Gallon Cool Mist Humidifier has a visible mist that provides temporary relief from cough and congestion. Using a humidifier can help ease dry air discomforts helping you to breathe better and sleep more comfortably. The Vicks humidifier is genuinely easy to clean with a wide tank opening and removable mist nozzle. This Vicks appliance also offers a unique feature only found in Vicks Humidifiers a scent pad door to accept Vicks Vapo Pads for added comfort. Vicks Vapo Pads come in a variety of scents ? Menthol Lavender and a Sinus Relief formula (sample pad of the Menthol included). The Vicks humidifier will provide visible cool mist for up to 36 hours depending on the mist output setting. All you have to do is relax in the comforting environment created by the cool-mist & scent of Vicks Vapo Pads.