The Rubbermaid Commercial HYGEN, Green 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. These mop heads are color-coded blue for general purpose cleaning in low-risk areas.