A paper towel is an absorbent, disposable towel made from paper. In Britain, paper towel for kitchen use is also known as kitchen roll, kitchen paper, kitchen towel. For home use, it usually sold in a roll of perforated sheets, but some are sold in stacks of pre-cut and pre-folded layers for use in paper-towel dispensers. Unlike cloth towels, paper towels are disposable and intended to be used only once. Paper towels soak up water because they are loosely woven which enables water to travel between the fibers, even against gravity (capillary effect). Paper towels have similar purposes to conventional towels, such as drying hands, wiping windows and other surfaces, dusting and cleaning up spills. Paper towel dispensers are often used in toilets shared by many people, as paper towels are often considered more hygienic than hot-air hand dryers (and, of course, shared cloth towels).