ACT-tex® fibers are incredibly fine, only 1/100 the size of a strand of human hair. Their flat, rectangular shape provides optimum surfaces for the collection of dirt, dust and allergenic pet hair. The ACT-tex® fibers attract dust by using static electricity when dry and by capillary action when damp. Static electricity and capillary action are used to attract and hold dirt on the fiber.  The ACT Damp-mop leaves only minimal clean water on your floor.