Used! When baby's nose is congested and sensitive skin is extra dry, you can keep your baby comfortable with the Filter Free Cool Mist Humidifier. It works by raising the room's humidity level with a cool and gentle mist to help ease cold symptoms, dry skin and itchy eyes.The large tank provides your nursery with up to 36 hours of soothing mist and it features variable mist output control for the moisture level that's right for your little one. When the humidifier runs dry, the top handle makes it easy to pick up for a quick rinse or refill. Designed for ultimate convenience, the humidifier operates quietly and without the hassle of changing filters.