Layers of microfiber fabrics evenly distribute steam to leave floors clean, sanitized, and dry within seconds. designed for use with Model No. S3501, Model No. S3601 (SKU 600470), and Model No. S3901 (SKU 600471) steam mop cleaners. 2 sided for double the cleaning performance. Machine washable, reusable. Set contains 2 rectangular pads. As seen on TV.