Microfiber works electro-statically so dust and dirt are attracted directly to the mop pad. The accumulated dirt is held tightly within the pad and not redistributed around the room during cleaning. These Microfiber Wet Mops contain a 100% microfiber filler which is more resistant to bacteria than other fiber-filled microfiber wet mops, reducing cross contamination. Fits (QCM-MFPADH) Pad Holder (sold separately). 18" x 5" or 24" x 5".