Special tiny microfibers made of polyester and polyamide lift dirt from surface and trap it in the mop head until it is washed. Looped microfibers on outer edge of mop, pick up and hold onto dirt, dust, pet hair and more and easily gets in corners, underneath and between furniture. Works great wet for light duty cleaning. Can be used on all types of hard surface floors. Washable mop head is 20" long x 7-3/4" wide. Collapsible frame makes it easy to remove and replace microfiber mop head. Includes telescopic handle with handy hang-up hole, which adjusts to any length from 29" to 52". Replacement head available separately (see below).