The Rubbermaid Commercial HYGEN Microfiber Damp Room Mop is constructed of premium split nylon/polyester blend microfiber that provides optimal damp mopping performance. Hook-and-loop microfiber mop pads attach securely and can be easily replaced when necessary. These floor mops withstand heavy use with double-finished edges that retain their floor mop shape and can be laundered more than 500 times, 200 with bleach.