A jet dryer is a device used to quickly dry hands after washing. It works by blowing a strong stream of warm air onto wet hands, evaporating the moisture in a matter of seconds. Jet dryers are commonly found in public restrooms and are considered a hygienic alternative to paper towels. These dryers are designed to be energy-efficient and can reduce waste associated with disposable paper products. Some models feature sensors that automatically activate when hands are placed underneath, ensuring a touchless experience. Popular brands of jet dryers include Dyson and Excel Dryer.